Task: Question Generation
Input (English): The cardinal who is the longest-serving member of the order of cardinal priests is titled cardinal protopriest. He had certain ceremonial duties in the conclave that have effectively ceased because he would generally have already reached age 80, at which cardinals are barred from the conclave. The current cardinal protopriest is Paulo Evaristo Arns of Brazil.
Output (English): Who can become the cardinal protopriest?