(S (S (BASENP (DT The) (JJ disabled) (NN girl)) (VP (VBD was) (VP (VP (VP (VBN operated) (PRT (RP upon))) (PP (IN at) (NP (BASENP (DT the) (NN request)) (PP (IN of) (BASENP (PRPD her) (NNS parents)))))) (COMMA ,) (S (VP (TO to) (VP (VP (VB prevent) (BASENP (PRP her))) (PP (IN from) (S (VP (VP (VBG growing) (COMMA ,) (VBG menstruating)) (CC and) (VP (VBG developing) (BASENP (NNS breasts)))))))))))) (PERIOD .))