Title: Dialect.
Question: From what language did the regional Romance languages of Italy derive?

Title: Sino-Tibetan relations during the Ming dynasty.
Question: Who supported van Praag's beliefs? 

Title: The Blitz.
Question: How many casualties did the British government estimate for every ton of bombs dropped?

Title: Adolescence.
Question:
At what average age did American females report their first sexual intercourse took place?