Which Pennsylvania county contains the towns of Doylestown and Quakertown?

Anthony Hopkins played which president in a 1995 Oliver Stone film? Which actress starred in "Contact," "The Accused" and "The Brave One"? Which Virgil masterpiece contains 12 books? Containing about 67.2 cubic inches, which U.S. dry measure equals 1/32 of a bushel? Which state contains the lowest point in the United States? Which continent lies almost entirely between 35 and 85 degrees west longitude? Which continent did Christopher Columbus think he was sailing to when he set off in August 1492? On which continent would you find the iron-rich Mesabi Range?