27553
Electron - withdrawing tetracyanoethylene , in contrast , does not cause p - type doping in MoS2 .
 Chemical: tetracyanoethylene; Chemical: MoS2
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: tetracyanoethylene; Chemical: MoS2