Mention Detection not 100% with gold mentions

[darsh10]

java -Xmx47g -jar berkeley-entity-1.0.jar ++config/base.conf -execDir scratch -mode COREF_PREDICT -testPath /home/development/darsh/MusOntoLearning/ground_truth/semeval/auto_small/ -modelPath models/joint-new-onto.ser.gz -numItrs 30 -outputPath /tmp/darsh/test_output_small/ -useGoldMentions

This is the command with which I ran the code. I have given the -useGoldMentions flag. I am getting very poor accuracy and the mention detection part is also not 100%.