| http://www.w3.org/ns/prov#value | - He says he would be happy to invest in a device like this, and he sees other invisible substances he???d also like to keep an eye on: ???It is very important to improve this technology so that we can verify if other toxic products are in the raw material we make food with: products such as heavy metals or other toxic products, so that we can sell healthy and clean produce to our customers???.
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