(S (S (PP (IN By) (S (VP (VBG studying) (NP (NP (BASENP (NN difference)) (PP (IN in) (NP (BASENP (DT the) (NN animal) (POS 's)) (NNS brains)))) (PP (IN after) (BASENP (NN slaughter))))))) (COMMA ,) (S (BASENP (DT the) (NN study)) (VP (ADVP (RB also)) (VP (VBZ showed) (SBAR (WHNP (WP what)) (S (VP (MD could) (VP (VB be) (NP (BASENP (DT a) (JJ biological) (NN determiner)) (PP (IN for) (SBAR (WHNP (WP what)) (S (VP (VBZ makes) (S (BASENP (DT a) (NN ram)) (ADJP (ADJP (JJ male-oriented) (CONJP (IN instead) (IN of)) (JJ female-oriented)) (ADVP (RB sexually))))))))))))))))) (PERIOD .))