15087
A dose - dependent inhibition was observed for the enzyme activities of Na ( + ) - K ( + ) - ATPase and Ca ( 2 + ) - ATPase in the gills after the fish were exposed for 90 days .
 Chemical: Na ( + ); Chemical: K ( + ); Chemical: Ca ( 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: Na ( + ), K ( + ), Ca ( 2 + ) 
Answer:
 Chemical: Na ( + ); Chemical: K ( + ); Chemical: Ca ( 2 + )