| http://www.w3.org/ns/prov#value | - The CPS pointed out the current proliferation in the art world of ???agit-prop??? ???installations??? comprising sit-ins, workshops and teach-ins, as well as materials including barrels, chains, carts, paving slabs, stones, cobbles, bricks, planks, scaffolding, earth, sandbags, tables, doors, Molotov cocktails, gas masks, motorcycle helmets, fireworks, signs, posters, placards and sundry items tha
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