Complex sentence: The school was originally'Nuneaton High School for Girls', the grammar school equivalent for girls passing the Eleven plus exam, however after the abolition of the tripartite system the school became mixed gender and changed its name to'Etone Community School'.
Split into simpler sentences: The school was originally'Nuneaton High School for Girls', the grammar school equivalent for girls passing the eleven plus exam. However, after the abolition of the tripartite system, the school became mixed sex and changed its name to'Etone Community School'.