About: http://webisa.webdatacommons.org/136774434

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	Calcium is an essential component shells, bones, teeth and plant structures.Additional Notes:Calcium was prepared as lime by the Romans under the name calyx in the 1st century A.D., but the metal was not discovered until 1808.
http://www.w3.org/ns/prov#wasQuotedFrom	environmentalchemistry.com