23527
Considerable evidence indicates that adenosine A2A receptors ( A2ARs ) modulate cholinergic neurotransmission , nicotinic acetylcholine receptor ( nAChR ) function , and nicotine - induced behavioural effects .
 Chemical: adenosine; Chemical: acetylcholine; Chemical: nicotine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: adenosine; Chemical: acetylcholine; Chemical: nicotine