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.

[EX Q]: in egyptain mythology sopdet was the goddess of the star sothis.
[EX A]: sopdet

[EX Q]: waiting for guffman is a musical mockumentary movie made in 1997.
[EX A]: waiting for guffman

[EX Q]: melleruds if is an association football club in mellerud in sweden, established on 29 july 1908.
[EX A]:
melleruds if