Expanded sharedContent to coverage of SocialMediaPosting example
Expanded sharedContent to coverage of SocialMediaPosting example

Expanded sharedContent to coverage of SocialMediaPosting example to answer issue (#997)
gkellogg/schemaorg,vholland/schemaorg,schemaorg/schemaorg,unor/schemaorg,schemaorg/schemaorg,unor/schemaorg,schemaorg/schemaorg,vholland/schemaorg,lanthaler/schemaorg,twamarc/schemaorg,unor/schemaorg,gkellogg/schemaorg,dbs/schemaorg,tfrancart/schemaorg,dbs/schemaorg,schemaorg/schemaorg,lanthaler/schemaorg,tfrancart/schemaorg,dbs/schemaorg,tfrancart/schemaorg,gkellogg/schemaorg,twamarc/schemaorg,tfrancart/schemaorg,vholland/schemaorg,lanthaler/schemaorg,vholland/schemaorg,schemaorg/schemaorg,dbs/schemaorg,gkellogg/schemaorg,twamarc/schemaorg