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The handheld pistol-and-trigger crossbow was invented in China in the fourth century BC ; it was written by the Song dynasty scholars Zeng Gongliang , Ding Du , and Yang Weide in their book " Wujing Zongyao " ( 1044 AD ) that massed missile fire by crossbowmen was the most effective defense against enemy cavalry charges .
 location: China; location: Song dynasty; person: Zeng Gongliang; person: Ding Du; person: Yang Weide
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: China, Song dynasty, Zeng Gongliang, Ding Du, Yang Weide 
Answer:
 location: China; location: Song dynasty; person: Zeng Gongliang; person: Ding Du; person: Yang Weide