(S (S (BASENP (PRP They)) (VP (VBD were) (PP (IN with) (NP (NP (BASENP (DT a) (NN party)) (PP (IN of) (BASENP (NN four)))) (SBAR (WHNP (WP who)) (S (VP (VBD had) (VP (VBN been) (VP (VBG angling) (PP (IN from) (BASENP (DT a) (NN 4.6) (NN m) (NN boat)))))))))))) (PERIOD .))