4276
Zhou Chi ( 周墀 ) ( 793 – March 23 , 851 ) , courtesy name Desheng ( 德升 ) , formally the Baron of Ru ' nan ( 汝南男 ) , was an official of the Chinese dynasty Tang Dynasty , serving as a chancellor during the reign of Emperor Xuānzong .
 person: Zhou Chi; person: Emperor Xuānzong
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Zhou Chi; person: Emperor Xuānzong