(S (S (BASENP (DT The) (JJ three-year-old) (NN colt)) (VP (VP (VP (VBD underwent) (BASENP (NN emergency) (NN surgery))) (PP (IN on) (BASENP (NNP May) (NN 20)))) (S (VP (TO to) (VP (VP (VB fuse) (BASENP (NN two) (NNS joints))) (PP (IN in) (BASENP (DT the) (JJ damaged) (JJ right) (NN leg)))))))) (PERIOD .))