(S (S (BASENP (PRP They)) (VP (VBD were) (VP (ADVP (RB also)) (VP (VBN asked) (S (VP (TO to) (VP (VB recall) (SBAR (SBAR (IN whether) (S (BASENP (PRP they)) (VP (VBD masturbated) (UCP (ADVP (RB alone)) (CC or) (PP (IN with) (BASENP (DT a) (NN partner))))))) (CONJP (COMMA ,) (CC and)) (SBAR (ADVP (RB also)) (SBAR (WHADVP (WRB how) (RB often)) (S (BASENP (PRP they)) (VP (VBD used) (BASENP (NNS condoms)))))))))))))) (PERIOD .))