Original sentence: Since the early 1990s, students from the ‘Experimental Class’(a class consisting of the most talented students from all over the province) have won 19 gold medals and 8 silver medals in International Mathematics Olympiad(IMO), International Physics Olympiad(IPhO), International Chemistry Olympiad(IChO), International Biology Olympiad(IBO) and International Environment Olympiad
Edited sentence: 41st IChO.Liu Ji.Since the early 1990s, students from the ‘Experimental Class’(a class consisting of the most talented students from all over the province) have won 20 gold medals and 8 silver medals in International Mathematics Olympiad(IMO), International Physics Olympiad(IPhO), International Chemistry Olympiad(IChO), International Biology Olympiad(IBO) and International Environment Olympiad