Context: The clock does not run during convert attempts in the last three minutes of a half. If the 15 minutes of a quarter expire while the ball is live, the quarter is extended until the ball becomes dead. If a quarter's time expires while the ball is dead, the quarter is extended for one more scrimmage. A quarter cannot end while a penalty is pending: after the penalty yardage is applied, the quarter is extended one scrimmage. Note that the non-penalized team has the option to decline any penalty it considers disadvantageous, so a losing team cannot indefinitely prolong a game by repeatedly committing infractions.

Question: What happens to a quarter whose time expires while the ball is still live in play?
Answer: extended

Question: What causes a quarter to be extended one additional play even if time has run out?
Answer: penalty

Question: How long is a quarter in minutes?
Answer: 15

Question: Which plays do not cause time to run off the clock during the final minutes of a half?
Answer: convert attempts

Question: When does the clock not run when a penalty is pending?
Answer: Unanswerable

Question: If a quarter's time expires while the ball is pending how long is the quarter extended?
Answer: Unanswerable

Question: When can't a scrimmage end?
Answer: Unanswerable

Question: What does the losing team have the option to do?
Answer: Unanswerable

Question: What is the name of the plays where the clock doesn't run near the end of a half?
Answer: Unanswerable