| http://www.w3.org/ns/prov#value | - Since the 19th century, handwritten notes have given way to mass-produced greeting cards.[6] In the UK, just under half of the population spend money on their Valentines and around 1.3 billion pounds are spent yearly on cards, flowers, chocolates and other gifts, with an estimated 25 million cards being sent.[68] The mid-19th century Valentine???s Day trade was a harbinger of further commercialize
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