Original sentence: However, critics of the deal have questioned both its length--the contract allows Cintra to collect tolls for 50 years--and the fact that the North Texas Tollway Authority (NTTA) was prevented from bidding on the contract
Edited sentence: However, critics of the deal have questioned both its length—the contract allows Cintra to collect tolls for 50 years—and the fact that the North Texas Tollway Authority (NTTA) was prevented from bidding on the contract