Press the "Pre-Process" button first to initialize the tagger. Then type a sentence into the upper window. Note that a space must inserted before each punctuation. At last, press the "Parse Sentence"  button and you will see the result in the lower window. The "Clear Input" button is to refresh the upper input window. 

NLP Module of COGST 201/PSYCH 201/COM S 201
mao@cs.cornell.edu