15096
Recent studies showed that beta - cell - specific Atg7 - null mice , when bred with ob / ob mice , developed severe diabetes , suggesting that autophagy - deficient beta - cells can handle basal metabolic stress but have problems dealing with increased metabolic stress .
 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