Complex sentence: Some fanciers organize exhibitions exclusively for pigeons and one held each year in Blackpool, England that is run by Royal Pigeon Racing Association was attended by 25,000 people and the £80,000 profit from the show was all donated to charity.
Split into simpler sentences: Some fanciers organize exhibitions exclusively for pigeons; one held each year in Blackpool, England that is run by the Royal Pigeon Racing Association was attended by 25,000 people. The £80,000 profit from the show was all donated to charity.