title: List of Stargate SG-1 episodes
context: Stargate SG-1 premiered on July 27, 1997 on the subscription channel Showtime. After five seasons on the same network, the Sci Fi Channel bought Stargate SG-1 and would air it for five further seasons, totalling to 214 episodes in ten seasons (seasons 1 through 7 consisted of 22 episodes each, and seasons 8 through 10 had 20 episodes each). Since the American broadcast splits each season to allow the production to catch up, the British channel Sky One aired the second part of some seasons before their American counterpart. Stargate SG-1's finale episode premiered in the United Kingdom on Sky One on March 13, 2007. The Sci Fi Channel concluded the tenth season on June 22, 2007. All seasons of Stargate SG-1 are available on DVD, and two direct-to-DVD Stargate films have continued the series, the first released in March 2008, the second in July 2008.
question: How long did Stargate SG-1 air for?
answers: ten seasons