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<http://schema.org/headline>
"今日は自由遊びの日です！"
<https://kabanneko.com/2019/03/%E4%BB%8A%E6%97%A5%E3%81%AF%E8%87%AA%E7%94%B1%E9%81%8A%E3%81%B3%E3%81%AE%E6%97%A5%E3%81%A7%E3%81%99%EF%BC%81/>