小黑吃完了食物，何老太看到它冲着屋子叫了两声，然后又从栅栏门底下钻了出去。
B-Thing I-Thing O O O B-Thing I-Thing O B-Person I-Person I-Person O O B-Thing O O B-Location I-Location O O B-Metric I-Metric O O O O O B-Location I-Location I-Location I-Location I-Location O O O O O