Complex sentence: Upon his release, he was taken into foster care and began attending a local Sixth Form College and also attended meetings of the Burnley Writers' Circle after seeing an advert for them in the local public library.
Split into simpler sentences: Upon his release, he was taken into foster care and began attending a local Sixth Form College. About this time he also started attended meetings of the Burnley Writers' Circle after seeing an advert for them in the local public library.