<http://schema.org/image>
<http://rack.0.mshcdn.com/media/ZgkyMDE0LzEwLzA5L2JhL2Vtb2ppLmIwNDRlLmpwZwpwCXRodW1iCTEyMDB4NjI3IwplCWpwZw/6b4ff21b/757/emoji.jpg>
<http://mashable.com/2014/09/03/emoji-design/>