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The coordinates are 29 ° 27 ' 30.68 " N 106 ° 32 ' 06.72 " E. History The school was established in 1938 under the direction of Dong Biwu , a proletariat revolutionary ; by the preparations of Tsinghua University schoolfellows who stayed in Chongqing .
 person: Dong Biwu; organization: Tsinghua University; organization: Chongqing
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: Dong Biwu, Tsinghua University, Chongqing 
Answer:
 person: Dong Biwu; organization: Tsinghua University; organization: Chongqing