User-agent: *
Allow: /

User-agent: Mediapartners-Google
Disallow: /fb/
Allow: /

User-agent: Googlebot
Disallow: /fb/
Disallow: /

User-agent: Googlebot-Image
Disallow: /fb/
Allow: /

User-agent: Adsbot-Google
Disallow: /fb/
Allow: /

User-agent: Googlebot-Mobile
Disallow: /fb/
Allow: /