Variables
Const mads
mads: "http://www.loc.gov/mads/rdf/v1#" = "http://www.loc.gov/mads/rdf/v1#"
Const schema
schema: "http://schema.org/" = "http://schema.org/"
Const sweet
sweet: "http://sweetontology.net/" = "http://sweetontology.net/"
Const yago
yago: "http://yago-knowledge.org/resource/" = "http://yago-knowledge.org/resource/"