Title: Gregorian calendar.
Question: Who said that English writers usually used both dates on writings?

Title: 2008 Sichuan earthquake.
Question: What was the name of Chan's music video?

Title: The Times.
Question: What is the name of the The Times founder's grandson who succeeded his father as editor?

Title: Hunter-gatherer.
Question:
What can decreased material possessions produce in a hunter-gatherer society?