Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

Q: "hail to the chief" is the official presidential anthem of the united states.

A: hail to the chief
****
Q: a bite is a wound received from the teeth of an animal.

A: bite
****
Q: hop and go is a 1943 looney tunes short movie directed by u.s. corporal norman mccabe and released to movie theaters by rko radio pictures.

A:
hop and go
****