Sentence 1: Until 31 May 1931 , Colonel Kenji Doihara , lieutenant colonel Kanji Ishiwara , Colonel Takayoshi Tanaka , and Major Seishiro had completed Itagaki plans for the incident .
Sentence 2: Colonel Kenji Doihara , Lieutenant Colonel Kanji Ishiwara , Colonel Takayoshi Tanaka and Major Seishirō Itagaki had completed plans for the incident by 31 May 1931 .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?