7172
We show that PEP - 19 increases the sensitivity of HeLa cells to ATP - induced Ca ( 2 + ) release to greatly increase the percentage of cells responding to sub - saturating doses of ATP and increases the frequency of Ca ( 2 + ) oscillations .
 Chemical: ATP; Chemical: Ca ( 2 + ); Chemical: ATP; 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: ATP, Ca ( 2 + ), ATP, Ca ( 2 + ) 
Answer:
 Chemical: ATP; Chemical: Ca ( 2 + ); Chemical: ATP; Chemical: Ca ( 2 + )