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.
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Question: in egyptain mythology sopdet was the goddess of the star sothis.

Answer: sopdet


Question: the vickers machine gun (also known as the vickers gun) was a machine gun that was used by the british army from 1912 to 1968.

Answer: vickers machine gun


Question: the bell-beaker culture (or beaker culture, beaker people or beaker folk) is the name of a cultural phenomenon which occurred in large parts of western europe, roughly between 2800 bc and 2200 bc (in great britain until about 1900 bc).

Answer:
beaker culture