Complex sentence: Unfortunately, this widely accepted date is grounded on inaccurate information taken from secondary sources, and the preponderance of the historical evidence, of which there is a considerable amount, clearly places the founding of Charleston's St. Cecilia Society in the year 1766.
Split into simpler sentences: Unfortunately, this widely accepted date is grounded on inaccurate information taken from secondary sources. The preponderance of historical evidence, of which there is a considerable amount, clearly places the founding of Charleston's St. Cecilia Society in the year 1766.