PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Most studies were also performed at a single site to avoid site-to-site variations in MRI. However, studies over a long period at a single research centre represent a ???best-case??? scenario, which can rarely be achieved in large studies, such as clinical trials, involving several hundred subjects.
http://www.w3.org/ns/prov#wasQuotedFrom
  • nih.gov