Task: Question Answering
Input (English): Ethan entered the hallway. Mason entered the hallway. The lettuce is in the blue_envelope. Mason exited the hallway. Ethan moved the lettuce to the green_treasure_chest. Mason entered the cellar. Logan entered the cellar. The watermelon is in the red_crate. Logan exited the cellar. Mason moved the watermelon to the green_pantry. Logan entered the hallway. Hannah entered the hallway. The lettuce is in the green_treasure_chest. Hannah exited the hallway. Logan moved the lettuce to the blue_envelope. Ethan is in the hallway. Logan is in the hallway. The lettuce is in the blue_envelope. Logan exited the hallway. Ethan moved the lettuce to the green_treasure_chest. Where was the lettuce at the beginning?
Output (English): blue_envelope