I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "If conditions change, so that the pope judges it safe to make the appointment public, he may do so at any time. The cardinal in question then ranks in precedence with those raised to the cardinalate at the time of his in pectore appointment. If a pope dies before revealing the identity of an in pectore cardinal, the cardinalate expires."?
A:
What could happen to a pope to make the cardinalate run out?