(S (S (S (BASENP (NNS Cattle)) (VP (VBD were) (ADJP (JJR easier) (S (VP (TO to) (VP (VB observe))))))) (CONJP (COMMA ,) (CC and)) (S (NP (NP (BASENP (NN 8,510) (NN head)) (PP (IN of) (BASENP (NNS cattle)))) (PP (IN at) (BASENP (NN 308) (NNS locations)))) (VP (VBD demonstrated) (NP (BASENP (DT a) (JJ strong) (NN tendency)) (SBAR (S (VP (TO to) (VP (VP (VB align) (BASENP (NN body) (NN orientation))) (PP (IN in) (NP (BASENP (NN accordance)) (PP (IN with) (NP (BASENP (DT the) (NN earth) (POS 's)) (BASENP (JJ magnetic) (NN field)))))))))))))) (PERIOD .))