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

Class VerbVoiceIndicator

java.lang.Object

edu.illinois.cs.cogcomp.edison.features.WordFeatureExtractor

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

All Implemented Interfaces:

FeatureExtractor

public class VerbVoiceIndicator
extends WordFeatureExtractor

Uses the parse tree to figure out whether a verb is an active or a passive voice. If the word is not a verb or not in a VP, then the word is marked as having "unknown" voice.

A predicate is either active or passive. We use a simple rule to determine this: if the verb follows a "to-be" verb in the same verb phrase and its POS tag is "VBN", then the predicate is passive. The verb may also be nested in other verb phrases that are themselves nested in the verb phrase containing the "to-be" verb, so long as the only phrases found in between the "to-be" verb and the target verb contain the target verb.

Author:

Vivek Srikumar, Gourab Kundu

Field Summary

Fields

Modifier and Type	Field and Description
static VerbVoiceIndicator	CHARNIAK
static VerbVoiceIndicator	STANFORD

Constructor Summary

Constructors

Constructor and Description
VerbVoiceIndicator(String parseViewName)

Method Summary

Modifier and Type	Method and Description
String	getName()
Set<Feature>	getWordFeatures(TextAnnotation ta, int wordPosition)

Methods inherited from class edu.illinois.cs.cogcomp.edison.features.WordFeatureExtractor

convertToWordFeatureExtractor, getFeatures

Methods inherited from class java.lang.Object

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

Field Detail

CHARNIAK

public static VerbVoiceIndicator CHARNIAK

STANFORD

public static VerbVoiceIndicator STANFORD

Constructor Detail

VerbVoiceIndicator

public VerbVoiceIndicator(String parseViewName)

Method Detail

getWordFeatures

public Set<Feature> getWordFeatures(TextAnnotation ta,
                                    int wordPosition)
                             throws EdisonException

Specified by:

getWordFeatures in class WordFeatureExtractor

Throws:

EdisonException

getName

public String getName()

Specified by:

getName in interface FeatureExtractor

Overrides:

getName in class WordFeatureExtractor