(S (S (BASENP (NNS Staff)) (VP (VBP have) (VP (VP (VBN walked) (PRT (RP out))) (PP (IN at) (NP (BASENP (NNS sites)) (PP (IN in) (NP (NP (NP (BASENP (NNP Scotland)) (COMMA ,) (BASENP (NNP Wales))) (CC and) (BASENP (NNP Teesside))) (PP (IN in) (BASENP (ADJP (JJ north) (JJ eastern)) (NNP England)))))))))) (PERIOD .))