Before pumpkins, what vegetable did Irish immigrants traditionally carve in America for Halloween?

Potatoes

In Icelandic tradition, what animal is said to eat people who haven't received new clothes before Christmas Eve? Who performed the hit single "All Star"? What band recorded "Sweet Emotion"? What was the last imperial dynasty to rule Persia, falling in 1979? Who was the first actor to portray Spider-Man in a big-budget film?