(S (S (BASENP (PRP They)) (VP (ADVP (RB frequently)) (VP (VP (VBP collaborate) (PRT (RP on))) (S (VP (VBG determining) (SBAR (WHADVP (WRB how) (RBS best)) (S (VP (TO to) (VP (VB effect) (BASENP (DT a) (NN repair))))))))))) (PERIOD .))