Please answer the following question: Generate a question about the following movie plot: Clifford (voiced by John Ritter), the big red dog of children's books and the TV series, hits the big screen for his great adventure. Clifford lives on Birdwell Island with Emily Elizabeth. Clifford hears the next-door neighbor talking to Emily's father about how much it cost to feed Clifford. Clifford is worried that the family might lose their house just feeding him. Clifford sees a poster announcing a contest for the best animal act with the winner getting a lifetime supply of dog food. Clifford, and his two dog friends, Cleo, and T-Bone, leave the island and join a traveling carnival show. They become friends with other animals in one of the sideshows, and soon, they become stars. Douglas Young (the-movie-guy)
Answer:
Clifford sees a poster advertising for what?