18. The computer program product of claim 13 , wherein the computer readable program further causes the computing device to monitor one or more channels of electronic communication of the one or more communication service computing systems to identify natural language statements exchanged over the one or more channels of electronic communication directed to the performance while the performance is being presented, at least by: processing the natural language statements to identify, for each natural language statement, an indicator in the natural language statement indicating that the natural language statement is directed to the performance.
18. The computer program product of claim 13 , wherein the computer readable program further causes the computing device to monitor one or more channels of electronic communication of the one or more communication service computing systems to identify natural language statements exchanged over the one or more channels of electronic communication directed to the performance while the performance is being presented, at least by: processing the natural language statements to identify, for each natural language statement, an indicator in the natural language statement indicating that the natural language statement is directed to the performance. 20. The computer program product of claim 18 , wherein other natural language statements exchanged over the one or more channels of communication that do not have an indicator indicating that they are directed to the performance are not used to extract feedback information.