| http://www.w3.org/ns/prov#value | - responded to the findings and the criticism by saying that it is hard to set a standard for processed food products, such as the oil and sauce packets in this case, since ???they are composed of oil, vegetables and other elements that might each have different background levels of metals.??????Vegetables, especially mushrooms, might have higher maximum residue limits of lead and cadmium due to the
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