<http://schema.org/headline>
"YAPC::Asia 2012 \u306B\u884C\u3063\u3066\u304D\u307E\u3057\u305F #yapcasia - @bayashi Diary"^^<http://www.w3.org/2001/XMLSchema#string>
<https://bayashi.net/diary/2012/1006>