1. A system comprising: at least one processor; and a memory device operatively connected to the at least one processor; wherein, responsive to execution of program instructions accessible to the at least one processor and configured to automatically discover at least one pattern in at least one text corpus, the at least one processor is configured to: extract at least one context string related to at least one annotator from the at least one text corpus; analyze the at least one context string for at least one sequence, the at least one sequence comprised of at least one subsequence; determine at least one sequence signature for each at least one sequence by applying applicable rules to the at least one sequence; and group the at least one sequence signature into at least one group corresponding to at least one sequence signature.