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.
--------
Question: srivilliputhur taluk is a taluk of virudhunagar district of the indian state of tamil nadu.

Answer: srivilliputhur taluk


Question: louise leakey (born 21 march 1972) is a kenyan paleontologist.

Answer: louise leakey


Question: the national archives of japan (独立行政法人国立公文書館, "dokuritsu gyosei hojin kokuritsu kōbunshokan"), also known by the acronym naj, is a japanese public institution which preserves government documents and historical records.

Answer:
national archives of japan