Question: Where is the headquarter located of which John Claiborne was an early president?
Sentence (from "New England Sports Network"): NESN (New England Sports Network) is an American regional sports cable and satellite television network that is owned by a joint venture of Fenway Sports Group (which owns a controlling 80% interest, and is the owner of Boston Red Sox and Liverpool Football Club) and Delaware North (which owns the remaining 20% interest in the network, and owns the Boston Bruins and the TD Garden).
Relevant evidence: Yes