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 movie producer, martin ransohoff, made a ten-minute documentary promoting her, called "all eyes on sharon tate".
Example Output: sharon tate

Example Input: myspace is a social networking website owned by news corp.
Example Output: myspace

Example Input: concerned women for america is a conservative christian activist group in the united states.
Example Output:
concerned women for america