PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Over time, hard water ??? or water that has been infiltrated by heavy levels of minerals and contaminants including iron, calcium and magnesium ??? can cause mineral build-up that can clog your pipes or even start to corrode the inside of your appliances.
http://www.w3.org/ns/prov#wasQuotedFrom
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