Complex sentence: In the 1930s and 1940s, the city served as a perennial host to the National Amateur Baseball Federation championship, eliciting praise from organization officials for the pristine condition of the community's sandlot baseball diamonds, which they described as among the best in the country.
Split into simpler sentences: In the 1930s and 1940s, the city was a frequent host of the National Amateur Baseball Federation (NABF) championship. NABF officials praised the community for the condition of its sandlot baseball diamonds, which they rated as among the best in the country.