An exercise to practice using Stanford NLP library to process Documents to construct Document-Word matrix.
javac -cp stanford-corenlp-3.9.1.jar:slf4j-simple.jar:protobuf.jar:stanford-corenlp-3.9.1-models.jar Preprocessing.java
java -cp .:stanford-corenlp-3.9.1.jar:slf4j-simple.jar:protobuf.jar:stanford-corenlp-3.9.1-models.jar Preprocessing