User-Agent: facebookexternalhit
Disallow: /*button.buttonUrl*
Disallow: /*creditUrl*
Disallow: /*US_CENSUS_NAME*
Allow: /*utm_campaign*
Allow: /*utm_medium*
Allow: /*utm_source*
Allow: /

User-agent: *
Disallow: /*utm_campaign*
Disallow: /*utm_medium*
Disallow: /*utm_source*
Disallow: /*button.buttonUrl*
Disallow: /*creditUrl*
Disallow: /*US_CENSUS_NAME*
Allow: /