
import java.util.Properties;
import java.util.Set;</BUG>
import edu.stanford.nlp.coref.CorefCoreAnnotations;
import edu.stanford.nlp.coref.CorefProperties;
<BUG>import edu.stanford.nlp.coref.CorefSystem;
</BUG>
import edu.stanford.nlp.coref.data.CorefChain;
import edu.stanford.nlp.coref.data.CorefChain.CorefMention;
import edu.stanford.nlp.coref.data.Document;

package edu.stanford.nlp.pipeline;
import edu.stanford.nlp.util.logging.Redwood;
import java.util.*;
import edu.stanford.nlp.coref.CorefCoreAnnotations;
import edu.stanford.nlp.coref.CorefProperties;
import edu.stanford.nlp.coref.hybrid.HybridCorefSystem;
import edu.stanford.nlp.coref.data.CorefChain;
import edu.stanford.nlp.coref.data.CorefChain.CorefMention;
import edu.stanford.nlp.coref.data.Document;
