家庭成员词汇：grandparents, cousin, uncle等 — 英语阅读题

阅读短文，回答问题。 My name is Lucy. There are seven people in my family. They are my grandpa, my grandma, my dad, my mum, my little brother Ben, my cousin Amy and me. My cousin Amy is my uncle's daughter. She is nine years old. We often play games together after school. On Sundays, my grandparents cook nice food for us. I love my big family. Question: Who is Amy's father in the family? 请用短文中的一个词回答。