info.ephyra.answerselection.filters
Class FactoidSubsetFilter

java.lang.Object
  info.ephyra.answerselection.filters.Filter
      info.ephyra.answerselection.filters.FactoidSubsetFilter

public class FactoidSubsetFilter
extends Filter

The FactoidSubsetFilter checks a set of factoid answers for subset relations. If a factoid answer is a subset of another factoid answer (i.e. its tokens are a subset of the tokens of another answer), then the former is dropped and its score is tranferred to the latter.

The filter is only applied if the longer answer is a named entity that has been extracted with a pattern-based or list-based tagger and thus is properly chunked. This is to avoid that malformatted answers which contain additional tokens (such as "1879 and") are preferred over properly chunked ones (e.g. "1879").

This class extends the class Filter.

Version:

2007-03-05

Author:

Nico Schlaefer

Constructor Summary

FactoidSubsetFilter()

Method Summary

Result[]

apply(Result[] results) Drops results that are subsets of other results and transfers their scores to the remaining results.

Methods inherited from class info.ephyra.answerselection.filters.Filter

apply

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FactoidSubsetFilter

public FactoidSubsetFilter()

Method Detail

apply

public Result[] apply(Result[] results)

Drops results that are subsets of other results and transfers their scores to the remaining results.

Overrides:

apply in class Filter

Parameters:

results - array of Result objects

Returns:

array of Result objects that are not subsets