Task: Translation
Input (Chinese): 警方说，他们找到了11辆以前被盗的摩托车、一枚手榴弹、一枚引信、一台对讲机和烟花（犯罪分子通常用烟花来警告同伙警察的到来）。
Output (English): Police say they recovered 11 previously stolen motorcycles, a grenade, a fusil, a walkie-talkie and fireworks (the criminals usually use fireworks to warn fellows about the arrival of police).