<http://schema.org/target>
"android-app://com.guardian/https/www.theguardian.com/world/gallery/2010/jan/22/michelleobama-barack-obama"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.theguardian.com/world/gallery/2010/jan/22/michelleobama-barack-obama?picture=358394230>