(S (S (SBAR (IN Although) (S (NP (BASENP (NNS millions)) (PP (IN of) (BASENP (NNPS Americans)))) (VP (VBP engage) (PP (IN in) (NP (BASENP (NN bikini) (NNS waxes)) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (ADVP (RB generally)) (VP (VBP cost) (NP (NP (QP (RB between) (NP (BASENP (DOLLAR $) (NN 50)) (CC and) (BASENP (DOLLAR $) (NN 60))))) (PP (IN per) (BASENP (NN session))))))))))))) (COMMA ,) (S (BASENP (DT the) (NN practice)) (VP (VBZ comes) (PP (IN with) (BASENP (NNS risks)))))) (PERIOD .))