26788
CONCLUSIONS : Our studies show that zinc promotes hypoxic cell death through overexpression of the hypoxia response factor HIF - 1 alpha via the cell fate determine factor PARP - 1 modification , which provides a novel mechanism for zinc - mediated ischemic brain injury .
 Chemical: zinc; Chemical: zinc
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: zinc, zinc 
Answer:
 Chemical: zinc; Chemical: zinc