2950
Under physiological conditions , LTP induction drives transient expression of calcium - permeable AMPARs ( CP - AMPARs ) at synapses , whose ability to undergo plasticity is primed by endogenous activation of adenosine A ( 2A ) receptors ( A ( 2A ) Rs ) .
 Chemical: calcium; Chemical: adenosine
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: calcium, adenosine 
Answer:
 Chemical: calcium; Chemical: adenosine