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: the standard time in kazakhstan is neither utc+05:00 or utc+06:00.
Example Output: time in kazakhstan

Example Input: las anod is a city in northern somalia.
Example Output: las anod

Example Input: paranthropus is an extinct genus of robust australopithecines.
Example Output:
paranthropus