8983
Neuronal nicotinic acetylcholine receptors ( nAChRs ) are ligand - gated ion channels that consist of pentameric combinations of alpha and beta subunits .
 Chemical: acetylcholine
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: acetylcholine 
Answer:
 Chemical: acetylcholine