Clarified that 'sponsor' is now in core, but we reference MedicalEntity only in extension. For #492.
Clarified that 'sponsor' is now in core, but we reference MedicalEntity only in extension.
For #492.

tfrancart/schemaorg,vholland/schemaorg,schemaorg/schemaorg,lanthaler/schemaorg,vholland/schemaorg,unor/schemaorg,twamarc/schemaorg,schemaorg/schemaorg,lanthaler/schemaorg,gkellogg/schemaorg,tfrancart/schemaorg,dbs/schemaorg,schemaorg/schemaorg,lanthaler/schemaorg,tfrancart/schemaorg,dbs/schemaorg,schemaorg/schemaorg,gkellogg/schemaorg,unor/schemaorg,tfrancart/schemaorg,gkellogg/schemaorg,vholland/schemaorg,twamarc/schemaorg,schemaorg/schemaorg,dbs/schemaorg,vholland/schemaorg,gkellogg/schemaorg,dbs/schemaorg,unor/schemaorg,twamarc/schemaorg