<http://schema.org/keywords>
"personalized photo cards,custom party invitations,custom party invitation,christian photo christmas cards,holiday party invitations,business christmas cards,company party invitations, anniversary invitations, custom photo card designs, 40th anniversary card, 40th anniversary invitation, 40th anniversary photo invitation, 40th wedding anniversary photo invitation, photo 40th anniversary invitation, ruby anniversary invitation, ruby wedding anniversary invitation"^^<http://www.w3.org/2001/XMLSchema#string>
<http://lilduckduck.com/forty-years-ruby-anniversary-invitation/120388>