Question: Boyd Matson is the former anchor of "National Geographic Explorer", an American documentary television series that originally premiered on what network on April 7, 1985?
Sentence (from "National Geographic Explorer"): National Geographic Explorer (or simply Explorer) is an American documentary television series that originally premiered on Nickelodeon on April 7, 1985, after having been produced as a less costly and intensive alternative to PBS's "National Geographic Specials" by Pittsburgh station WQED.
Relevant evidence: Yes