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: guido altarelli (july 12, 1941 - september 30, 2015) was an italian theoretical physicist.

Output: guido altarelli


Input: Consider Input: enac alumni (also referred to as ingenac) is an alumni association based in toulouse, midi-pyrénées.

Output: enac alumni


Input: Consider Input: kelly mcgillis (born july 9, 1957) is an american actress.


Output: kelly mcgillis