Title: Wood.
Question: Along with insect infestation, what process can discolor wood and make it look like heartwood?

Title: Paris.
Question: Where are Paris' financial service companies majorly located?

Title: BeiDou Navigation Satellite System.
Question: What was the name of the first satellite launched for the system?

Title: Dissolution of the Soviet Union.
Question:
What was attacked by Soviet troops on January 13?