question: What is the answer: Which is the lightest (least dense) metal?
answer: lithium

question: What is the answer: "The first editions of Lewis Carroll's ""Alice ..."" books were given a special flavour by illustrations by which 19th century graphic humourist and political cartoonist?"
answer: sir john tenniel

question: What is the answer: Edward Elgar's March no 1 in D contains the tune of what song?
answer: land of hope and glory

question: What is the answer: What national park, the first in the world, is home to the Roosevelt Arch, whose cornerstone was laid by the totally badassed president himself in 1903?
answer:
yellowstone