Title: Roman Republic.
Question: What country did the Romans continue to expand to after Rome was sacked?

Title: Karl Popper.
Question: Which of Popper's works addresses the improvement of scientific understanding of the world over time?

Title: Poultry.
Question: How long does it take for the flu vaccine to be fully ready for deployment into the population ?

Title: CBC Television.
Question:
What year did the CBC begin contributing funds to the show Doctor Who?