Based on the given question and tppic, give an answer. The answer is available on on the internet. The questions are mostly centered around a single named entity.

concept: Ulysses S Grant  question:  what wars did ulysses s grant served in?
['Grant rises in the West.', 'Ulysses S. Grant: The Unlikely Hero', 'Ulysses S Grant, 1861-1864', 'The Civil War memoirs of Ulysses S. Grant', 'The generalship of Ulysses S. Grant', 'Grant', 'Grant and Twain: The Story of a Friendship That Changed America', 'Letters of Ulysses S. Grant to His Father and His Youngest Sister', 'Personal memoirs', 'Ulysses S. Grant: The Soldier And the Man']

concept: Barack Obama  question:  when was barack obama elected president?
['1/10/2011']

concept: United States Navy  question:  what planes does the navy have?

LTV A-7 Corsair II