15068
We have investigated the characteristics of voltage - gated K ( + ) channels and L - type Ca ( 2 + ) channels in GH3 rat pituitary cells and the effects of the xenoestrogen ( XEs ) nonylphenol ( NP ) on these ion channel currents .
 Chemical: K ( + ); Chemical: Ca ( 2 + ); Chemical: xenoestrogen; Chemical: nonylphenol
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: K ( + ), Ca ( 2 + ), xenoestrogen, nonylphenol 
Answer:
 Chemical: K ( + ); Chemical: Ca ( 2 + ); Chemical: xenoestrogen; Chemical: nonylphenol