(S (S (NP (NP (NP (BASENP (DT The) (NN vaccine) (POS 's)) (NN functioning)) (PP (IN in) (BASENP (DT a) (JJ heterosexual) (NN population)))) (CC and) (NP (BASENP (PRPD its) (NN effectiveness)) (PP (IN among) (BASENP (NNS women))))) (VP (MD will) (VP (ADVP (RB also)) (VP (VB be) (VP (VBN studied)))))) (PERIOD .))