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: mohamed allalou (born september 28, 1973) is an algerian boxer.

Answer: mohamed allalou


Question: nick halling is a british sportscaster.

Answer: nick halling


Question: rubidium nitrate is a chemical compound.

Answer:
rubidium nitrate