20573
MicroRNAs play a crucial role in the biogenesis and function of the cardiovascular system and act as important regulators of various metabolic and signaling pathways in cardiovascular disease .
 None
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:  
Answer:
 None