1. A method of presenting summaries of stories respectively associated with at least one message on a computer having a processor, the method comprising: executing on the processor instructions configured to: for respective messages, identify at least one entity involved in the message; cluster the messages according to the at least one entity identified in the respective messages to identify, for a story, a message cluster comprising at least two messages that individually present the story; using the messages of the message cluster, identify at least one expression that frequently appears in the messages of the message cluster; identify at least two opinions about the story that are respectively expressed by at least one message of the message cluster; from the at least one expression of the messages, extract at least one fact of the story; and responsive to receiving from a user a request to present messages about the story: identify a perspective of the user; using the at least one fact of the story described in messages expressing an opinion about the story that matches the perspective of the user, generate a summary of the story; and present the summary to the user.
1. A method of presenting summaries of stories respectively associated with at least one message on a computer having a processor, the method comprising: executing on the processor instructions configured to: for respective messages, identify at least one entity involved in the message; cluster the messages according to the at least one entity identified in the respective messages to identify, for a story, a message cluster comprising at least two messages that individually present the story; using the messages of the message cluster, identify at least one expression that frequently appears in the messages of the message cluster; identify at least two opinions about the story that are respectively expressed by at least one message of the message cluster; from the at least one expression of the messages, extract at least one fact of the story; and responsive to receiving from a user a request to present messages about the story: identify a perspective of the user; using the at least one fact of the story described in messages expressing an opinion about the story that matches the perspective of the user, generate a summary of the story; and present the summary to the user. 10. The method of claim 1 : respective messages generated by a message source; and the instructions configured to, for respective message sources generating at least one message, identify a message source perspective of the message source according to the story perspectives of the stories of the messages generated by the message source.