| http://www.w3.org/ns/prov#value | - Y is for example methylene, ethylene, trimethylene, tetramethylene, pentamethylene, hexamethylene, 1-methylethylene, 1,2-dimethylethylene, 2-methyltrimethylene, 2-oxatrimethylene, 2-azatrimethylene, 2-aza-2-methyltrimethylene, 3-oxapentamethylene, 3-azapentamethylene or 3-aza-3-methylpentamethylene.
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