You are given a paragraph (Passage), a question (Question) and two answer options (Option1 and Option2). Your task is to find the correct answer (and return the string of the correct option, not option1/2) for the given question from the given options and based on the given passage. Answer of the question can be found directly from the passage.

Let me give you an example: Passage: Omelettes make a great breakfast , and I enjoy making them because they are very easy to cook . First , I get the eggs out and begin cracking them on the side of the bowl and dumping them into the bowl . I normally use two eggs whites and one whole egg to cut the calories . I add some salt and pepper to the mix for flavor . I pour the mixture into the hot frying pan . I make sure that I add some vegetable oil to the pan before I add the eggs though because I do n't want them to stick . As this occurs , I add some cheese or vegetable to the center of the egg mixture . Really , almost any type of cheese or vegetable makes a good omelette . I then flip one side of the omelette over on to itself to seal in the contents in the middle . It is then ready to serve ! Question: How many times is the omelette flipped? Option1: three times Option2: once
The answer to this example can be: once
Here is why: As mentioned in the passage that I then flip one side of the omelette; it is clear that omelette is flipped one time only.

OK. solve this:
Passage: Last week I have prepared a shopping list along with my mother . We needed some groceries , milk and household items . First we took note of all needed items . Then I added bread , oil , milk and milk products needed for the upcoming week . Then my father had some things to be shopped including his shaving cream , bath liquid and shoe polish . I added them in the list . Then , we discussed for the missing things . Then we found out that we are in shortage of toilet tissues and kitchen towels . I added them in the list too . It was really a good and fun experience to get the shopping list prepared . Question: When did they prepare the shopping list? Option1: last night Option2: Last week
Answer:
Last week