2945
Our findings suggest that IL - 6 influences the expression of lipocalin - 2 , which in turn may be involved in the control of the formation of Cox - 2 , and hence central PGE ( 2 ) - production .
 Chemical: PGE ( 2 )
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: PGE ( 2 ) 
Answer:
 Chemical: PGE ( 2 )