| http://www.w3.org/ns/prov#value | - Thus, for example, there can be different ticket groups for a general admission event, wherein one ticket group includes tickets with no associated merchandise, a second ticket group includes Units including a ticket and a first type of merchandise (e.g., a tee-shirt with a performer-related design), and a third group includes Units including a ticket and a second type of merchandise (e.g., a jack
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