Input (grade 13): The lawnchair used in the flight was given to an admiring boy named Jerry, though Walters later regretted doing so, since the Smithsonian Institute asked him to donate it to its museum.
Output (grade 9): Larry gave the lawnchair from the flight to a boy named Jerry because the boy liked him. Later, Walters realized that was a mistake when the Smithsonian Institute asked him to donate it to its museum.