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.

Input: Consider Input: glenn branca (october 6, 1948 – may 13, 2018) was an american avant-garde composer and guitarist.

Output: glenn branca


Input: Consider Input: the demographics of pakistan are a study of the population and the people.

Output: demographics of pakistan


Input: Consider Input: a type rating is an authorization to fly a certain aircraft type that requires additional training.


Output: type rating