Video: 0256_sharpen_pencil_2
Phase transition: separate
State before: solid:non_particulate
State after: solid:non_particulate
Object: In the process of sharpening the pencil, all the parts of the pencil which at the initial frame
目标物体: 在削铅笔的过程中，位于初始帧中所有的铅笔的部分