For all of these corpora, we generated realistic substitutes for the [REMOVED] tokens using dictionaries (e.g., a dictionary of names from US Census Bureau) and patterns (e.g., names of people could be of the formats, "Mr. F. Lastname", "Firstname Lastname", "Lastname", "F. M. Lastname", etc.
we built an SVMbased system that, given a target word (TW), would accurately predict whether the TW was part of PHI.