About: http://webisa.webdatacommons.org/405774375

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	When commercial television launched in the late 1930s in the U.S., music and variety comedy were the most popular types of content.
http://www.w3.org/ns/prov#wasQuotedFrom	alexcalic.com