Complex sentence: Blackfen School for Girls is a girls' secondary school and sixth form with academy status, located in Blackfen in the London Borough of Bexley, England, the sixth form over the past few years has become mixed.
Split into simpler sentences: Blackfen School for Girls is a girls' secondary school and sixth form with academy status, located in Blackfen in the London Borough of Bexley, England. Although it is a girls school, the sixth form over the past few years has become mixed.