7644
Interleukin - 6 induces vascular endothelial growth factor expression and promotes angiogenesis through apoptosis signal - regulating kinase 1 in human osteosarcoma .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None