(S (S (BASENP (NNP Wellington) (NNP Airport)) (VP (VP (MD will) (RB not)) (VP (VB comment) (PP (IN on) (SBAR (WHADVP (WRB why)) (S (BASENP (PRP they)) (VP (VBD declined) (NP (BASENP (DT the) (NN billboard)) (PP (IN on) (BASENP (PRPD its) (NN property))))))))))) (PERIOD .))