Complex sentence: Since 2004, the community has sponsored an annual Trout Parade (organized by the Catskill Art Society and the Chamber of Commerce) which has been compared to the Mermaid Parade.
Split into simpler sentences: Since 2004, the community has sponsored an annual Trout Parade (organized by the Catskill Art Society and the Chamber of Commerce). It has been compared to the Mermaid Parade.