PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Then spend another year learning how to build scientific intuition through estimation, asking such questions as how long the air will last for a person in a sealed room or whether there is enough solar energy for mankind's needs.Then devote another year to case studies, comparing, say, risks to costs of building a bridge with ever-decreasing safety margins.
http://www.w3.org/ns/prov#wasQuotedFrom
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