(S (S (S (BASENP (PRP He)) (VP (VP (VBD convinced) (S (BASENP (NNP Bolt)) (VP (TO to) (VP (VP (VP (VB make) (BASENP (DT the) (NN switch))) (PP (IN from) (BASENP (NN cricket)))) (PP (TO to) (BASENP (NN track))))))) (CC and) (VP (VP (VP (VBD trained) (BASENP (PRP him))) (PRT (RP up))) (PP (IN until) (NP (BASENP (DT the) (NN age)) (PP (IN of) (BASENP (NN 16)))))))) (COMMA ,) (SBAR (WHADVP (WRB when)) (S (BASENP (NNP Bolt)) (VP (VBD joined) (NP (BASENP (DT the) (NNP Jamaica) (NNP Amateur) (NNP Athletic) (NNP Association-administered) (NNP High) (NNP Performance) (NNP Training) (NNP Centre)) (PP (IN in) (BASENP (NNP Kingston)))))))) (PERIOD .))