Original sentence: One of the world's largest Catholic universities in terms of population, it was established in April 28, 1611, and claims to be the oldest existing university in the Philippines and in Asia, although this is disputed by the University of San Carlos in Cebu City, which was founded in 1595 but was granted university charter in 1948
Edited sentence: One of the world's largest Catholic universities in terms of population, it was established in April 28, 1611, and is the oldest existing university in the Philippines and in Asia, although that is challenged by the University of San Carlos in Cebu City, which was founded in 1595 but was granted university charter in 1948