21107
However , Rac1 activation was not affected by Jak2 or Stat3 RNA interference , suggesting that the effect of cucurbitacin I occurs through a Jak2 - independent mechanism .
 Chemical: cucurbitacin I
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: cucurbitacin I 
Answer:
 Chemical: cucurbitacin I