(S (S (BASENP (PRP He)) (VP (VBZ is) (VP (VBG suffering) (PP (IN from) (NP (BASENP (DT the) (JJ constant) (NN attention)) (PP (IN of) (NP (BASENP (NNS sharks)) (COMMA ,) (SBAR (WHNP (WP who)) (S (ADVP (RB often)) (VP (VP (VBP bump) (BASENP (PRPD his) (NN boat))) (CC and) (VP (VBP disrupt) (NP (BASENP (PRPD his) (NNS attempts)) (PP (IN at) (BASENP (NN sleep))))))))))))))) (PERIOD .))