(S (S (PP (IN For) (BASENP (NN example))) (COMMA ,) (S (BASENP (PRP it)) (VP (MD can) (VP (VB occur) (PP (IN after) (NP (NP (BASENP (JJ multiple) (NNS procedures)) (S (VP (TO to) (VP (VP (VB clear) (BASENP (DT the) (NN uterus))) (PP (IN after) (BASENP (DT a) (NN miscarriage) (CC or) (NN abortion))))))) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (VP (VBN known) (PP (IN as) (NP (DT a) (NP (QT (DQL ``) (BASENP (NN D) (CC &) (NN C)) (DQR '')) (NN procedure)))))))))))))) (PERIOD .))