Complex sentence: Mayo Clinic is known for being at the top of most accredited quality standard listings; for example, it has been near the top of the U.S. News & World Report List of Best Hospitals for more than 20 years.
Split into simpler sentences: Mayo Clinic is known for being at the top of most accredited quality standard listings. For example, it has been near the top of the U.S. News & World Report List of Best Hospitals for more than 20 years.