(S (S (BASENP (DT The) (NNP LHC)) (VP (VBZ is) (NP (BASENP (DT a) (ADJP (NN 27) (NN kilometer)) (NN long) (NN circular) (JJ high) (NN energy) (NN particle) (NN accelerator)) (SBAR (WHNP (WDT which)) (S (VP (VP (VBD took) (NP (NP (QP (ADVP (RBR more) (IN than)) (NN 20)) (NNS years)) (CC and) (BASENP (NN USD) (QP (DOLLAR $) (NN 9) (NN billion))))) (S (VP (TO to) (VP (VB build)))))))))) (PERIOD .))