(S (S (NP (BASENP (NNP Mr.) (NNP Haddox)) (PRN (COMMA ,) (SBAR (WHNP (WP who)) (S (VP (VP (VBZ specialises) (PP (IN in) (NP (BASENP (DT the) (NN building)) (PP (IN of) (NP (NP (NP (BASENP (NNS earthworks)) (COMMA ,) (BASENP (NNS roads))) (COMMA ,) (BASENP (NN water) (NN supply))) (CC and) (BASENP (NN sewage) (NNS systems))))))) (CONJP (COMMA ,) (CC and)) (VP (VBZ is) (VP (VP (VBG working) (PP (IN as) (BASENP (DT a) (NN missionary)))) (PP (IN in) (BASENP (NNP Guatemala)))))))) (COMMA ,))) (VP (VP (VP (VBD visited) (BASENP (DT the) (NN site))) (PP (VBG following) (BASENP (DT the) (NN collapse)))) (S (VP (TO to) (VP (VB help) (PP (IN in) (BASENP (DT the) (NN recovery) (NN effort)))))))) (PERIOD .))