2745
He was completely deaf in his left ear , but disguised this fact by always positioning himself to the left of people he was talking to , ensuring the his right ear was closest to them and he could hear them perfectly .
 None
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:  
Answer:
 None