那时姑父负责往中央局大院运送白大灰，用以修缮中央领导人居住的土坯房。
B-Time I-Time B-Person I-Person O O O B-Organization I-Organization I-Organization B-Location I-Location O O B-Thing I-Thing I-Thing O O O O O B-Person I-Person I-Person I-Person I-Person O O O B-Thing I-Thing I-Thing O