Complex sentence: Annette Walter-Lax (March 9,1956-in Stockholm, Sweden) is a Swedish former model in the 1970s and was Keith Moon's girlfriend from 1974 to his death in 1978.
Split into simpler sentences: Annette Walter-Lax (March 9,1956-in Stockholm, Sweden) is a Swedish former model. She was modelling in the 1970s and dated Keith Moon from 1974 to his death in 1978.