Complex sentence: The Seattle Thunderbirds are a minor league ice hockey team that plays in Key Arena that arrived in Seattle in 1977 as the Seattle Breakers before changing to their current name in 1985.
Split into simpler sentences: The Seattle Thunderbirds are a minor league ice hockey team that plays in Key Arena. The Thunderbirds arrived in Seattle in 1977 as the Seattle Breakers before changing to their current name in 1985.