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.

Example Input: terry and june is a british sitcom that was shown on bbc one from 1979 until 1987.
Example Output: terry and june

Example Input: the 7 july 2005 london bombings (also called 7/7) were suicide bomb attacks aimed at london's public transport system during the morning rush hour.
Example Output: 7 july 2005 london bombings

Example Input: a serpopard is a mythological animal, often seen carved on cosmetic palettes (used for mixing antimony as eye shadow), during the old kingdom of egypt.
Example Output:
serpopard