PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • As for extinction, here is one theory: Lloyd et al. (2008) noted that, in the Mid Cretaceous, the flowering angiosperm plants became a major part of terrestrial ecosystems, which had previously been dominated by gymnosperms such as conifers.
http://www.w3.org/ns/prov#wasQuotedFrom
  • washingtonpost.com