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Linguistic based techniques for text simplification
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/*
 * lookups.jape
 *
 * Copyright (c) 2004-2013, The University of Sheffield.
 * 
 * This file is part of GATE (see http://gate.ac.uk/), and is free software,
 * Licensed under the GNU Library General Public License, Version 3, June 2007
 * (in the distribution as file licence.html, and also available at
 * http://gate.ac.uk/gate/licence.html).
 * 
 * Original version developed by Mark A. Greenwood as part of his PhD thesis.
 *
 * This grammar implements some of the ideas found in:
 * http://owl.english.purdue.edu/owl/resource/572/1/
 *
 * In the examples redundant is  while replace is 
 */

Phase: ProcessLookups
Input: Token Lookup
Options: control = appelt

//Based on 1. Eliminate Unnecessary Determiners and Modifiers
// For all intents and purposes, American industrial productivity generally depends on certain factors that are really more psychological in kind than of any given technological aspect.
Rule:DL1
(
	{Lookup.majorType == "removable"}	
):removable
-->
    :removable.Redundant = {rule = "DL1"}


Rule:RL1
(
	{Lookup.majorType == "replaceable"}
):replace
-->
{
	Annotation lookup = bindings.get("replace").iterator().next();
		
	// get the start and end of this section
	Node start = lookup.getStartNode();
	Node end = lookup.getEndNode();
	
	FeatureMap params = Factory.newFeatureMap();
	params.put("replacement",lookup.getFeatures().get("minorType"));
	params.put("rule","RL1");
	
	outputAS.add(start,end,"Redundant",params);
}

Rule:N1
(
	{Token.string == "is"}
	({Token.string == "the"}
	({Lookup.majorType == "nominalizations"}):lookup
	{Token.string == "of"}):replace
)
-->
{
	Annotation lookup = bindings.get("lookup").iterator().next();
	
	AnnotationSet replace = bindings.get("replace");
		
	// get the start and end of this section
	Node start = replace.firstNode();
	Node end = replace.lastNode();
	
	try
	{
		String noun = doc.getContent().getContent(lookup.getStartNode().getOffset(),lookup.getEndNode().getOffset()).toString().toLowerCase();
		
		String verb = ((Map)getActionContext().getPRFeatures().get("noun2verb")).get(noun);
		
		if (verb != null)
		{	
			FeatureMap params = Factory.newFeatureMap();
			params.put("replacement","to "+verb);
			params.put("rule","N1");
		
			outputAS.add(start,end,"Redundant",params);
		}
	}
	catch (Exception e)
	{
		e.printStackTrace();
	}		
}