| http://www.w3.org/ns/prov#value | - The UC citrus research center swings open its doors this week to give farmers and the public the opportunity to view and taste dozens of mandarin varieties - which in recent years have emerged as Americans' favorite citrus ??? as well as sweet oranges, lemons, grapefruit, kumquats, blood oranges, tangors and many other types of citrus fruit.
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