22. The system of claim 17 , wherein the instructions to identify the plurality of messages includes instructions to identify the messages based on recipients of the messages.
17. A system including memory and one or more processors operable to execute instructions stored in memory, comprising instructions to: identify a plurality of messages from one or more databases; determine a plurality of interrogative sentences from the messages; determine starting n-grams from the interrogative sentences; determine a group of task indications, wherein each of the task indications of the group is based on a set of one or more of the starting n-grams, and wherein determining to include a given task indication of the task indications in the group is based on a count of the starting n-grams that conform to the given task indication; provide the group of the task indications; receive, in response to providing the group of the task indications, one or more task association measures for each of the task indications of the group, wherein a given task association measure for a given task indication is indicative of likelihood that the given task indication is associated with a task request; determine a task association score for each of the task indications of the group, wherein the task association score for the given task indication is based on the one or more task association measures received for the given task indication; and store the task association score for each of a plurality of the task indications of the group.