About: http://webisa.webdatacommons.org/317034327

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In the formulas (2-a) and (2-b), examples pf the alkali earth metal (M2) may include metals in Group 2 of the periodic table, such as beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) and radium (Ra).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com