| http://www.w3.org/ns/prov#value | - A pillow, cushion, or the like comprising a sheet forming a pocket, means for filling the pocket, the sheet being substantially impermeable to the means for filling the pocket, the sheet including means defining a vent opening, a cover for the vent opening, and means for mounting the cover movably relative to the opening, the cover including means defining an opening, the cover being movable betwe
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