(S (S (BASENP (ADJP (JJ Male) (CC and) (JJ female)) (NNS respondents)) (VP (VBD were) (VP (VBN asked) (S (VP (TO to) (VP (VB note) (SBAR (WHADVP (WRB how) (RB frequently)) (S (BASENP (PRP they)) (VP (VBD masturbated) (PP (PP (IN in) (NP (BASENP (DT the) (JJ past) (NN three) (NNS months)) (COMMA ,) (BASENP (DT the) (JJ past) (NN year)))) (CONJP (COMMA ,) (CC and)) (PP (IN throughout) (BASENP (PRPD their) (NN lifetime))))))))))))) (PERIOD .))