Task: Question Answering
Input (English): Passage: To sew a button on a piece of clothing , you will need a needle and thread . Some people also use a thimble to prevent being pricked by the needle and to help push the needle through the clothing . You can choose to match the color of the thread to the button , the clothing , or neither one . About 6 inches of thread is probably enough to sew a button . Put one end of the thread through the eye of the needle and pull it through about halfway . Then , tie the two ends of the thread together in a knot . Start by pushing the needle through the back of the clothing and though a buttonhole so that the knot does n't show . Pull the thread all the way through . Then , push the needle down through the other buttonhole so that the button is secured . Question: What is to be attached? Option1: The button. Option2: The thread.
Output (English): The button.