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<http://webisa.webdatacommons.org/prov/456622182>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/167215794> .
<http://webisa.webdatacommons.org/167215794>	<http://www.w3.org/ns/prov#value>	"Weight-loss surgery can make it hard for your body to absorb some nutrients, such as folic acid, calcium, vitamin B12, and iron." .
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