(S (S (BASENP (NNS Researchers)) (VP (ADVP (RB also)) (VP (VBP say) (SBAR (IN that) (SBAR (SBAR (IN because) (S (BASENP (DT the) (NN rhino)) (VP (VBZ is) (ADJP (ADJP (RB so) (JJ isolated)) (PP (IN from) (NP (BASENP (DT the) (NN rest)) (PP (IN of) (BASENP (NNP Malaysia))))))))) (COMMA ,) (SBAR (IN that) (S (BASENP (PRP they)) (VP (VP (VBP are) (ADVP (RB rarely))) (ADJP (JJ able) (S (VP (TO to) (VP (VB breed) (ADVP (RB together)))))))))))))) (PERIOD .))