Smart pig

　　Hello, everyone. My name is Bill. Many people think that pigs are stupid. But this is wrong. In the children's Encyclopedia, a pig and a dog were trapped in a room. Guess who came first? Maybe a lot of people think it's a dog. It's a pig! It's a pig. Tell you a story. A couple of fifty or sixty. They keep a pig and a dog. One day, they went to see a friend. They came to a small village and went to Jack's house. They want to go swimming. So her husband and friends went swimming in the river. While his wife, walking along the river with a pet. 1.5 hours later, his wife had a heart attack. Pig immediately to find the owner. A day later, his wife woke up. She is grateful to pet pig. You say, pig is not very clever?