Commercial users were also required not to produce any competing tools : In October 2005 , McVoy contacted a customer using commercially licensed BitKeeper , demanding that an employee of the customer stop contributing to the Mercurial project , a GPL source management tool .
ADJ NOUN AUX ADV VERB PART PART VERB DET VERB NOUN : ADP PROPN NUM , PROPN VERB DET NOUN VERB ADV VERB PROPN , VERB SCONJ DET NOUN ADP DET NOUN VERB VERB ADP DET ADJ NOUN , DET PROPN NOUN NOUN NOUN .