About: http://webisa.webdatacommons.org/251273734

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Although not black, it is medium grey in colour.Some sort of support (wire mesh, wood lattice, plastic rod, etc.) which allows the mat to sit flat 2 above the water such that you have air flow both above and below the mat, may work well.
http://www.w3.org/ns/prov#wasQuotedFrom	burningman.com