11873
In this study , we assessed the antitumor activity of PTE against human osteosarcoma cells and explored the role of JAK2 / STAT3 and apoptosis - related signaling pathways on the activity of PTE .
 Chemical: PTE; Chemical: PTE
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: PTE, PTE 
Answer:
 Chemical: PTE; Chemical: PTE