User-agent: *
Disallow:

User-agent: TurnitinBot
Disallow: / 

User-agent: ConveraCrawler
Disallow: /

User-agent: QuepasaCreep 
Disallow: / 

User-agent: Jetbot 
Disallow: /

# update 19-10
User-agent: TwengaBot
Disallow: /