150670
Xiahou Zi ( 夏侯孜 ) , courtesy name Haoxue ( 好學 ) , formally the Duke of Qiao Commandery ( 譙郡公 ) , was an official of the Chinese dynasty Tang Dynasty , serving two terms as a chancellor during the reigns of Emperor Xuānzong and Emperor Xuānzong 's son Emperor Yizong .
 Xiahou Zi, Emperor Xuānzong, Emperor Xuānzong, Emperor Yizong
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Xiahou Zi, Emperor Xuānzong, Emperor Xuānzong, Emperor Yizong