(S (S (NP (NP (BASENP (NN Emergency) (JJ Contraceptive) (NNS Pills)) (CC or) (BASENP (NNS ECPs))) (PRN (LRB -LRB-) (NP (ADJP (QT (DQL ``) (JJ morning-after) (DQR '')) (CC or) (QT (DQL ``) (JJ next-day) (DQR ''))) (NNS pills)) (RRB -RRB-))) (VP (VBP are) (VP (VP (VBN used) (S (VP (TO to) (VP (VB prevent) (BASENP (DT an) (JJ unintended) (NN pregnancy)))))) (COMMA ,) (PP (VBG following) (BASENP (JJ unprotected) (JJ sexual) (NN intercourse)))))) (PERIOD .))