As Dutch leader in 1672, William of Orange cut which structures to flood the land and foil the invading French?

As Dr. Alan Quartermaine, Stuart Damon starred for decades on which daytime drama, beginning in 1977? As Doctor Dolittle, Rex Harrison sang which song that won the 1967 Oscar for Best Original Song? Which U.S. holiday was first celebrated with a workers' parade in New York City in September 1882? As Drake McHugh in 1942's "Kings Row," which future politician uttered the line "Where's the rest of me?" As early as 1727, Johann Schulze discovered that salts of which element darken in light, though he made no images? As early as 1867, which New York City store with a red star symbol stayed open until midnight on Christmas Eve? As early as 3000 B.C., which gemstone was known in China as "yu," or the royal gem? As East Timor, the eastern half of the island of Timor broke away from which island nation in 2002?