Title: PlayStation 3.
Question: Which Ratchet & Clank title debuted at E3 2007?

Title: Nutrition.
Question: How many glycerol backbones does a triglyceride contain?

Title: European Central Bank.
Question: How long had the time to maturity been previously?

Title: Incandescent light bulb.
Question:
When did Swan receive a patent for parchmentised thread?