180900
Many historic records show that Li father and sons - Li Sixun ( father ) and Li Zhaodao ( son , Chinese : 李昭道 ; Pinyin : Lǐ Zhāo-Dào , son of Li Sixun ) , largely developed the painting techniques and formulated the style .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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