(S (S (PP-SBJ (BASENP (NN 彼ら)) (IN は)) (COMMA 、) (VP (PP (NP (S-REL (PP (NP (PP (BASENP (NN ４．６) (NN ｍ)) (IN の)) (NN ボート)) (IN で)) (S-NSBJ (VP (PP-OBJ (BASENP (NN 釣り)) (IN を)) (VP (VP (VBV し) (INTE て)) (VP (VBV い) (VP (MD た))))))) (NP (PP (BASENP (NN ４) (NN 人)) (IN の)) (NN パーティ))) (IN と)) (VP (PP (BASENP (NN 一緒)) (IN に)) (VP (VBV い) (VP (MD た)))))) (PERIOD 。))
彼ら は 、 4.6 m の ボート で 釣り を し て い た 4 人 の パーティ と 一緒 に い た 。
They were with a party of four who had been angling from a 4.6 m boat .