9. A computer system for managing analysis of sentiment, the computer system comprising: a bus system; one or more computer readable storage devices connected to the bus system, wherein the one or more computer readable storage devices store program instructions; and one or more processors connected to the bus system, wherein the one or more processors execute the program instructions to: retrieve data used to perform the analysis of sentiment; analyze the data and the analysis of sentiment using user preferences comprising integration preferences for using social networks and crowdsourcing platforms and policies to determine if a gap in the analysis of sentiment exists requiring further processing to improve the analysis of sentiment, wherein the gap exists in sentiment analysis of source materials determined to be insufficient to derive sentiment for aspects of entities, and wherein gap identification uses the policies to identify the gap based on measures of sentiment not meeting one or more thresholds in the policies; determine an amount of positive sentiment in the data and negative sentiment in the data for each topic in a set of topics corresponding to aspects of an entity and selecting, by the computer, a topic from the set of topics corresponding to a particular aspect of the entity for the further processing based on determining that the amount of positive sentiment in the data and negative sentiment in the data for the selected topic fails to meet a threshold amount of positive and negative sentiment for the selected topic to derive sentiment for the particular aspect of the entity in response to analyzing the data and the analysis of sentiment to determine if the gap in the analysis of sentiment exists; generate a task using a particular task template, in a set of task templates, matching a type of the gap to address the gap in the analysis of sentiment regarding the selected topic that failed to meet the threshold amount of positive and negative sentiment for the selected topic to derive sentiment for the particular aspect of the entity, wherein the task comprises a specification for performing the task comprising a description of activity, a domain ontology, a description of the gap, a description of the task, sentiment information, measures of sentiment about aspects of entities associated with the gap, questions for a survey from the task template, and instructions for completing the task to address the gap; and use crowdsourcing to submit the task for processing to address the gap in the analysis of sentiment regarding the selected topic that failed to meet the threshold amount of positive and negative sentiment for the selected topic to derive sentiment for the particular aspect of the entity, wherein using the crowdsourcing to submit the task for processing further comprises the one or more processors further executing the program instructions to: identify users associated with the topic about the particular aspect of the entity based on an amount of sentiment information about the topic in retrieved data from each user; determine a group sentiment about the topic corresponding to a group of users on a social network; and select one or more users within the group of users on the social network to submit the task to based on the determined group sentiment about the topic.
9. A computer system for managing analysis of sentiment, the computer system comprising: a bus system; one or more computer readable storage devices connected to the bus system, wherein the one or more computer readable storage devices store program instructions; and one or more processors connected to the bus system, wherein the one or more processors execute the program instructions to: retrieve data used to perform the analysis of sentiment; analyze the data and the analysis of sentiment using user preferences comprising integration preferences for using social networks and crowdsourcing platforms and policies to determine if a gap in the analysis of sentiment exists requiring further processing to improve the analysis of sentiment, wherein the gap exists in sentiment analysis of source materials determined to be insufficient to derive sentiment for aspects of entities, and wherein gap identification uses the policies to identify the gap based on measures of sentiment not meeting one or more thresholds in the policies; determine an amount of positive sentiment in the data and negative sentiment in the data for each topic in a set of topics corresponding to aspects of an entity and selecting, by the computer, a topic from the set of topics corresponding to a particular aspect of the entity for the further processing based on determining that the amount of positive sentiment in the data and negative sentiment in the data for the selected topic fails to meet a threshold amount of positive and negative sentiment for the selected topic to derive sentiment for the particular aspect of the entity in response to analyzing the data and the analysis of sentiment to determine if the gap in the analysis of sentiment exists; generate a task using a particular task template, in a set of task templates, matching a type of the gap to address the gap in the analysis of sentiment regarding the selected topic that failed to meet the threshold amount of positive and negative sentiment for the selected topic to derive sentiment for the particular aspect of the entity, wherein the task comprises a specification for performing the task comprising a description of activity, a domain ontology, a description of the gap, a description of the task, sentiment information, measures of sentiment about aspects of entities associated with the gap, questions for a survey from the task template, and instructions for completing the task to address the gap; and use crowdsourcing to submit the task for processing to address the gap in the analysis of sentiment regarding the selected topic that failed to meet the threshold amount of positive and negative sentiment for the selected topic to derive sentiment for the particular aspect of the entity, wherein using the crowdsourcing to submit the task for processing further comprises the one or more processors further executing the program instructions to: identify users associated with the topic about the particular aspect of the entity based on an amount of sentiment information about the topic in retrieved data from each user; determine a group sentiment about the topic corresponding to a group of users on a social network; and select one or more users within the group of users on the social network to submit the task to based on the determined group sentiment about the topic. 10. The computer system of claim 9 , wherein the one or more processors further execute the program instructions to: re-calculate the analysis of sentiment based on receiving a result of the processing of the task to address the gap in the analysis of sentiment regarding the selected topic that failed to meet the threshold amount of positive and negative sentiment for the selected topic to derive sentiment for the particular aspect of the entity; and determine that the received result of the processing of the task closed the gap in the analysis of sentiment regarding the selected topic based on re-calculating of the analysis of sentiment in response to a policy in the policies that previously identified the gap no longer identifying the gap.