PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • ???M??? in the above hydrophilic groups is an alkali metal such as lithium, sodium or potassium; and organic ammonium such as mono- to tri-methylammonium, mono- to tri-ethylammonium or mono- to tri-methanolammonium.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com