<http://schema.org/name>
"T\u00EDnh n\u0103ng y\u00EAu c\u1EA7u \"Add Contact\" hi\u1EC7n \u0111ang \u0111\u01B0\u1EE3c th\u1EED nghi\u1EC7m trong Facebook Messenger "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.forumgiaitri.net/t5386-tinh-nang-yeu-cau-add-contact-hien-ang-uoc-thu-nghiem-trong-facebook-messenger>