493
In the field of physics , Ouyang Zhongcan , a research fellow at the Institute of Theoretical Physics , used the liquid crystal method to come up with a biological membrane model .
 Work for: Ouyang Zhongcan, Institute of Theoretical Physics
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: Organization based in, Located in, Live in, Work for, Kill 
Text: {0} 
Answer:
 Work for: Ouyang Zhongcan, Institute of Theoretical Physics