2878
Bullous keratopathy was usually aphakic in origin in 1982 , but after 1983 pseudophakic bullous keratopathy ( PBK ) was the most common cause of bullous keratopathy .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None