10. One or more non-transitory computer-readable media as recited in claim 5 , further storing computer-executable instructions that, when executed on one or more processors, perform acts comprising: determining that the source includes multiple statistically improbable phrases; determining words that compose the multiple statistically improbable phrases; and determining phrases that are associated with at least one of the determined words that compose the multiple statistically improbable phrases.
10. One or more non-transitory computer-readable media as recited in claim 5 , further storing computer-executable instructions that, when executed on one or more processors, perform acts comprising: determining that the source includes multiple statistically improbable phrases; determining words that compose the multiple statistically improbable phrases; and determining phrases that are associated with at least one of the determined words that compose the multiple statistically improbable phrases. 11. One or more non-transitory computer-readable media as recited in claim 10 , wherein the multiple statistically improbable phrases comprise statistically improbable phrase that appears in the source.