7447
The retinoid - related orphan receptors ( RORs ) were postulated to have functions in tissue development and circadian rhythm .
 Chemical: retinoid
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: retinoid 
Answer:
 Chemical: retinoid