context: The short starts with a grasshopper, playfully hopping and playing his fiddle. As he rests for a bit, he observes a colony of ants working hard to store food for winter.As one little ant struggles with a cartload of food, the grasshopper talks to him, expounding his philosophy of how the 'world owes him a living,' and gets the little ant to dance along to his fiddling. However, their revelry is cut short when the ant queen appears, frightening the little worker back to his duties. The ant queen cautions the grasshopper that when winter comes, his tune of merriment will be different. However, the grasshopper chooses to ignore her, and goes on with his carefree attitude.Shortly afterward, the winter cold and snow come. The ants retreat to their home in a hollow tree. Meanwhile, the grasshopper struggles against the cold to find food, before knocking at the ants' door for salvation. Several of the workers take pity on him, allowing him to warm up and eat.These actions are observed by the queen. She crossly confronts the grasshopper, who pleads with her to let him stay. The queen then gives the grasshopper his fiddle, allowing him to stay with the colony if he will entertain them through the winter months. The grasshopper joyously bursts into song, singing of the lesson he's learned from the ants.
question: What did the grasshopper sing after the ants let him in?
answer: The grasshopper sang about the lessons he's learned.