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<http://schema.org/headline>
"アドバンス講座開催"
<https://kinseishikai.jp/training-session/kinsei-course/%E3%82%A2%E3%83%89%E3%83%90%E3%83%B3%E3%82%B9%E8%AC%9B%E5%BA%A7%E9%96%8B%E5%82%AC-3/35754/>