(S (S (BASENP (DT The) (NN breast) (NN milk)) (VP (VBD was) (VP (VBN donated) (PP (IN by) (NP (BASENP (NN fifteen) (NNS women)) (SBAR (WHNP (WP who)) (S (VP (VBD responded) (PP (TO to) (NP (BASENP (DT an) (JJ online) (NN advertisement)) (VP (VBN located) (PP (IN on) (NP (BASENP (DT a) (NN forum)) (VP (VBN aimed) (PP (IN at) (BASENP (NNS mothers))))))))))))))))) (PERIOD .))