Complex sentence: Ramsbottom's amateur dramatic group, the Summerseat Players, a registered charity run entirely not-for-profit, puts on five performances in each season, and a performances by local schools and dance groups, along with the company's own youth theatre groups.
Split into simpler sentences: Ramsbottom's amateur dramatic group is called the Summerseat Players, a registered charity that is run entirely not-for-profit. It typically puts on five performances in each season, as well as a number of other events such as performances by local schools and dance groups, along with the company's own youth theatre groups.