Read the following article and answer the question. Article: The cartoon movie Bolt is an interesting movie. All the characters are very lovely. The movie is about a dog and his name is Bolt. Bolt is a dog star. He always thinks he is very strong. He often plays in TV programs. Many people love him. So he is a little proud. One day people take him to New York, but the poor dog is lost there. The place is far from his home town. It's about 2,000 miles away. Bolt wants to return to his world. He has to face all the danger all by himself. He begins to go across the USA. On his way he meets Mittens, a lonely cat. Then they meet a mouse. His name is Rhino. He likes watching TV very much. They become friends. They meet many strange animals and people on their way. At last Bolt feels that he can be a hero both in TV programs and in real life. The movie is very instructive. Question: What is Bolt? Answer:
He is a dog star.