Complex sentence: SAI was founded in 1961 by a group of artists from England who called themselves the Inscape Group, among themDiana Hesketh, Peter Holland, Brigid Marlin, Jack Ray and Steve Snell.
Split into simpler sentences: SAI was founded in 1961 by a group of artists from England who called themselves the Inscape Group. They included Diana Hesketh, Peter Holland, Brigid Marlin, Jack Ray and Steve Snell.