| http://www.w3.org/ns/prov#value | - a bedframe, a first barrier defining a gap adjacent thereto, the barrier including an opening therethrough, a mattress positioned on the bedframe, and a second barrier including a bridge positioned to extend from the first barrier to close the gap and a coupler configured to couple the bridge to the first barrier, the coupler including a first plate sized to fit over the opening, a second plate si
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