User-agent: psbot
Disallow: /
User-agent: TurnitinBot
Disallow: /
User-agent: NPBot-1/2.0
Disallow: /
User-agent: NPBot
Disallow: /
User-agent: *
Disallow: /1/search
Disallow: /2/search
Disallow: /4/search
Disallow: /5/search
Disallow: /6/search