Task: Question Answering
Input (English): Passage: I brought my dog Waldo to the pet store . There was a lady there that knew how to train animals . She greeted us and then started to work with Waldo .  She taught him a bunch of different things , like how to sit and how to give his paw to me .  The trainer first taught him to give his paw and then taught him to roll over . After the trainer worked with Waldo , I interacted with him and tried to get him to do some tricks . Waldo showed me what he had learned with the trainer .  He gave me his paw and then rolled over when I told him to . I thanked the trainer and set up another appointment for Waldo next week . Then , I came home . Question: Who taught him the tricks? Option1: The writer Option2: the lady at the pet store who knew how to train animals
Output (English): the lady at the pet store who knew how to train animals