13661
Though Cheng was able to complete the full set of prehistoric pottery reproductions requested by the museum , and at a level of quality that received high grades from the museum and from consultant Liu I - chang , Cheng himself still feels there are things that he could have done better .
 person: Cheng; person: Liu I - chang; person: Cheng
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
 Entities: Cheng, Liu I - chang, Cheng 
Answer:
 person: Cheng; person: Liu I - chang; person: Cheng