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: the waldorf astoria chicago, formerly the elysian hotel chicago, is a luxury hotel located at 11 east walton street in the gold coast area of chicago, illinois.

Output: waldorf astoria chicago


Input: Consider Input: hop and go is a 1943 looney tunes short movie directed by u.s. corporal norman mccabe and released to movie theaters by rko radio pictures.

Output: hop and go


Input: Consider Input: varig brazilian airlines, also known as "varig", was once the largest airline of brazil.


Output: varig brazilian airlines