Complex sentence: With 21 total conference titles, Clemson is one of the founding members of the ACC, and holds 15 ACC titles, the most of any charter member, and holds the most combined conference football titles of any Atlantic Coast Conference school.
Split into simpler sentences: With 21 total conference titles, Clemson is one of the founding members of the ACC and holds 15 ACC titles, the most of any charter member. The program holds the most combined conference football titles of any Atlantic Coast Conference school.