Title: Neptune.
Question: If Neptune formed closer to the sun, what is the matter density?

Title: Frédéric Chopin.
Question: What Mozart song was sung at Chopin's funeral?

Title: Gregorian calendar.
Question: What are New Style dates?

Title: University of Notre Dame.
Question:
Against which opponent did Knute Rockne tell his team to "win one for the Gipper?"