<https://www.davidwin.net/?tag=%e6%bf%9f%e5%85%ac%e7%be%85%e6%bc%a2%e7%a5%9e%e6%9c%a8#primaryimage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.davidwin.net/?tag=%E6%BF%9F%E5%85%AC%E7%BE%85%E6%BC%A2%E7%A5%9E%E6%9C%A8>