Complex sentence: Schuller was principally known for the weekly "Hour of Power" television program, which he began in 1970 and hosted until 2010, where he began his broadcasting services from the Neutra Sanctuary with the encouragement Billy Graham.
Split into simpler sentences: Schuller was principally known for the weekly "Hour of Power" television program, which he began in 1970 and hosted until 2010. The program was began broadcasting from the Neutra Sanctuary with the encouragement Billy Graham.