| http://www.w3.org/ns/prov#value | - ????-ethylenically unsaturated compound will be a hydroxy ester of acrylic acid or ????-substituted derivative thereof such as methacrylic acid, e.g. a hydroxyalkyl acrylate or methacrylate of which hydroxyethyl and hydroxypropyl acrylates and methacrylates are the most common examples, especially the acrylates.
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