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: the long-beaked echidnas make up one of the two genera (genus zaglossus) of echidna.

Answer: long-beaked echidna


Question: institut d'optique graduate school (supoptique) is a renowned graduate engineering school in france.

Answer: institut d'optique graduate school


Question: the pocono 400 is a monster energy nascar cup series race held annually at pocono raceway, it is one of two races held at the circuit, with the other one being the gander outdoors 400 in august.

Answer:
pocono 400