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<http://webisa.webdatacommons.org/271680289>	<http://www.w3.org/ns/prov#value>	"uch as animal welfare, sustainability and nutrition.After years of pressure from animal rights advocates, brands such as Burger King and Smithfield Foods plan to exclusively use suppliers who offer eggs from cage-free hens, pork from humanely treated animals and similar products.Wal-Mart and McDonald???s have thrown their backing behind sustainable seafood labeling." .