| http://www.w3.org/ns/prov#value | - a bedframe, a mattress configured to support a patient, the mattress including a bottom surface resting on the bedframe, a top surface facing away from the bottom surface, and a rotational therapy device, the top surface having a right portion and a left portion, the rotational therapy device being configured to provide a normal operation during which the right and left portions of the top surface
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