edu.illinois.cs.cogcomp.edison.features.factory

Class LevinVerbClassFeature

java.lang.Object

edu.illinois.cs.cogcomp.edison.features.factory.LevinVerbClassFeature

All Implemented Interfaces:

FeatureExtractor

public class LevinVerbClassFeature
extends Object
implements FeatureExtractor

Adds a collection of features that correspond to Levin's verb classes, as defined in "English Verb Classes And Alternations: A Preliminary Investigation"

This class assumes the existence of a file called verbClass.txt in the class path. If the input constituent has an attribute called PredicateArgumentView.LemmaIdentifier, it treats the attribute as the lemma of the verb. This lemma is used to index Levin's list and the corresponding verb classes are returned as discrete features. If the lemma is not present in the list, then the feature set contains a single feature: "unknown". If the input constituent doesn't have the required attribute, an empty feature set is returned.

Author:

Vivek Srikumar

Field Summary

Fields

Modifier and Type	Field and Description
static LevinVerbClassFeature	instance

Constructor Summary

Constructors

Constructor and Description
LevinVerbClassFeature()

Method Summary

Modifier and Type	Method and Description
Set<Feature>	getFeatures(Constituent c)
String	getName()

Methods inherited from class java.lang.Object

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

Field Detail

instance

public static LevinVerbClassFeature instance

Constructor Detail

LevinVerbClassFeature

public LevinVerbClassFeature()

Method Detail

getFeatures

public Set<Feature> getFeatures(Constituent c)
                         throws EdisonException

Specified by:

getFeatures in interface FeatureExtractor

Throws:

EdisonException

getName

public String getName()

Specified by:

getName in interface FeatureExtractor