Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following 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
Solution: once
Reason: As mentioned in the passage that I then flip one side of the omelette; it is clear that omelette is flipped one time only.

Now, solve this instance: Passage: My dog is a very large , 180 pound great dane named Walter . Walter is pretty lazy but about 5 times a week he likes to get outside for a while and walk around to take in some interesting smells . On these days , I will usually wait until around 9 am before I tell Walter he is going to get a walk . Once he hears that word he gets incredibly excited and jumps around , almost knocking pictures off of my walls . I have a special harness that allows me to control Walter when he gets excited , but does not choke or hurt him . I walk around a loop in my neighborhood for around 30 minutes before Walter gets tired and wants to go home . After we get back , I give Walter a treat if he was good and prepare his breakfast for him . Question: What did they put on him? Option1: a collar Option2: A harness.
Student:
A harness.