<http://schema.org/keywords>
"\u30C6\u30AF\u30CE\u30ED\u30B8\u30FC"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.huffingtonpost.jp/2013/08/27/sperm_freeze_drying_n_3825963.html?ncid=edlinkusaolp00000003>