Complex sentence: Colossos is the tallest and fastest wooden roller coaster in Europe and the tallest running wooden roller coaster in the world (the tallest overall is Son of Beast at Kings Island), which has been SBNO (standing but not operating) since June 2009.
Split into simpler sentences: Colossos is the tallest and fastest wooden roller coaster in Europe and the tallest running wooden roller coaster in the world. The tallest overall is Son of Beast at Kings Island, which has been SBNO (standing but not operating) since June 2009.