(S (S (BASENP (NNP Future) (NNP Heathrow)) (VP (VP (VBP believe) (SBAR (IN that) (S (BASENP (NNP Heathrow) (NN airport)) (VP (VBZ is) (ADJP (JJ crucial) (PP (TO to) (NP (BASENP (NN prosperity)) (PP (IN of) (BASENP (DT the) (NNP Thames) (NNP Valley) (NN region)))))))))) (CONJP (COMMA ,) (CC and)) (VP (VBP are) (PP (IN in) (NP (BASENP (NN favor)) (PP (IN of) (S (VP (VP (VBG building) (BASENP (DT a) (JJ third) (NN runway))) (PP (IN at) (BASENP (DT the) (NN airport))))))))))) (PERIOD .))