<http://suneo9.s1009.xrea.com/%e3%82%a4%e3%83%bc%e3%82%b9-i%e3%83%bbii-ys-book-iii-pc%e3%82%a8%e3%83%b3%e3%82%b8%e3%83%b3%e5%ae%9f%e6%a9%9f-5/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://suneo9.s1009.xrea.com/%E3%82%A4%E3%83%BC%E3%82%B9-i%E3%83%BBii-ys-book-iii-pc%E3%82%A8%E3%83%B3%E3%82%B8%E3%83%B3%E5%AE%9F%E6%A9%9F-5/>