Original sentence: The annual alumni band made up of previous band members who have since graduated from UMass but return to participate in the event was the largest the university had ever seen, with approximately 900 to 1,000 participants
Edited sentence: The annual alumni band (made up of previous band members who have since graduated from UMass but return to participate in the event) was the largest the university had ever seen, with approximately 900 - 1,000 participants