A majority of the errors made by the parser were due to a few nagging problems, one such being topicalization analysis for sentences that have two sentence initial nouns. On a parse failure, the parser retrieves the best sequence of fragments that spans the longest part of the sentence. Jerry R. Hobbs and John Bear. Two Principles of Parse Preference . Giardini with Kluwer, 1994.
Linear combination appears to be the method of choice in several such systems.
J. R. Hobbs and J. Bear. Two Principles of Parse Preference . Applying parse preferences requires comparing two subtrees spanning the same portion of the utterance. The parse preference mechanism begins with a simple strategy to disprefer parse trees containing specific marked syntax rules. No context found.