(S (S (SBAR (S-NSBJ (VP (PP-OBJ (NP (PP (PP (NP (S-REL-NSBJ (VP (ADVP (NN 密接) (INRB に)) (VP (VP (VBV 寄り) (VP (VBV 集まっ) (INTE て))) (VP (VB いる))))) (NP (PP (BASENP (NN 近隣)) (IN の)) (NN 建物))) (IN へ)) (IN の)) (NN 延焼)) (IN を)) (VB 食い止める))) (NN ため)) (COMMA 、) (S (PP-SBJ (BASENP (NN 彼ら)) (IN は)) (VP (PP (NP (NP (PP (BASENP (NN 人)) (IN の)) (NN 力)) (INFK だけ)) (IN で)) (VP (PP-OBJ (NP (PP (BASENP (NN いくつ) (INFKB か)) (IN の)) (NN 建物)) (IN を)) (VP (VBO 壊さ) (VP (MDP (MDO なけれ) (INCON ば) (VBO なら) (MDV なかっ)) (VP (MD た)))))))) (PERIOD 。))
密接 に 寄り 集まっ て いる 近隣 の 建物 へ の 延焼 を 食い止める ため 、 彼ら は 人 の 力 だけ で いくつ か の 建物 を 壊さ なけれ ば なら なかっ た 。
To stop the fire from spreading to other nearby buildings , which are closely grouped together , they were forced to pull some of them down using nothing but man power .