23062
omega - Agatoxin - IVA is a well known P / Q - type Ca ( 2 + ) channel blocker and has been shown to affect presynaptic Ca ( 2 + ) currents as well postsynaptic potentials .
 Chemical: Ca ( 2 + ); 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: Ca ( 2 + ), Ca ( 2 + ) 
Answer:
 Chemical: Ca ( 2 + ); Chemical: Ca ( 2 + )