(S (S (BASENP (JJ Further) (NNS surgery)) (VP (VBD was) (VP (VP (VBN required) (PP (IN on) (BASENP (NNP January) (NN 27)))) (S (VP (TO to) (VP (VP (VB insert) (BASENP (NN two) (NN steel) (NNS pins))) (PP (IN into) (NP (BASENP (NN one)) (PP (IN of) (BASENP (DT the) (JJ healed) (NNS bones))))))))))) (PERIOD .))