(S (S (BASENP (PRP They)) (VP (ADVP (RB also)) (VP (VP (VBD tested) (NP (BASENP (JJ virgin) (NNS mice)) (VP (VBN given) (BASENP (JJ additional) (NN prolactin))))) (CONJP (COMMA ,) (CC and)) (VP (VBD found) (NP (BASENP (NNS results)) (ADJP (JJ similar) (PP (TO to) (BASENP (JJ pregnant) (NNS mice))))))))) (PERIOD .))