Complex sentence: In 1985, the Steins, William Becker, and Jonathan B. Turell founded The Voyager Company, to publish educational multimedia CD-ROMs (1989--2000), during which time, The Criterion Collection became a sub-ordinate division of the Voyager Company.
Split into simpler sentences: In 1985, the Steins, William Becker, and Jonathan B. Turell founded The Voyager Company, to develop multimedia CD-ROMs, publishing educational discs from 1989 until 2000. In that time, The Criterion Collection became a division of the Voyager Company.