1987
MK - 927 : a topically active ocular hypotensive carbonic anhydrase inhibitor .
 GENE: carbonic anhydrase
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: carbonic anhydrase 
Answer:
 GENE: carbonic anhydrase