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"): Although the National Geographic Society had been producing specials for television for 20 years prior to "Explorer", the premiere of the series required an increase in production from 4 hours of programming a year to 156 hours.
Relevant evidence: No