168317
In 1996 , he introduced the powerful concept of Metadata Reference Link ( MREF ) for associating metadata to hypertext that links documents on the Web , and described an RDF - based realization in 1998 , long before RDF was adopted as a W3C recommendation .
 organization: W3C recommendation
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: W3C recommendation 
Answer:
 organization: W3C recommendation