premise: 10-year-old Billy's uncle sent him a collectible coin every birthday.
initial: Billy showed off the collection to some boys from school.
counterfactual: Billy kept his promise not to sell any of the coins until his 21st birthday.
original_ending: One of the boys told Billy he had a baseball for sale. Billy really wanted the baseball. Billy exchanged several of his coins for the baseball.
edited_ending: One of his friends told Billy he had a baseball for sale.Billy really wanted the baseball.Billy just turned 21 so he exchanged several of his coins for the baseball.<SEP>One of the boys told Billy he had a baseball for sale.Billy really wanted the baseball.Billy still did not exchange any of his coins for the baseball.<SEP>One of the boys at school had a new baseball.Billy really wanted the baseball.Billy offered to trade some of his coins for the baseball.