Filter 4 alone provides a high degree of compression; for example, it reduces a total of 16,000 words in the combined sentences that include Vernon Jordan' s name in the Clinton corpus to 578 words in 12 sentences; sentences up to the target length can be selected from these based on scores from Filter 1 and then Filter 3.
as this is a MDS system, we also evaluate the nonredundancy of the descriptions, since similar information may be repeated across documents.