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: priyanka chopra (born on 18 july 1982 in jamshedpur, bihar, india) is an indian actress, singer and dancer.

Output: priyanka chopra


Input: Consider Input: the arrondissement of auxerre is an arrondissement of france.

Output: arrondissement of auxerre


Input: Consider Input: the vektor r4 is a south african assault rifle.


Output: vektor r4