Question: What is the question to: "Furthermore, possession is legal or effectively legal in the Netherlands , North Korea and would be in the U.S. states of Colorado and Washington if it were not for federal law, which governs persons in all states."? The topic is Legality of cannabis.
Answer: "what countries legalize marijuana?"

Question: What is the question to: "Four complete seasons aired, ending on February 8, 2010."? The topic is Heroes (TV series).
Answer: "how many seasons heroes?"

Question: What is the question to: "Add-ons for Firefox (addons.mozilla.org), the official Mozilla Foundation web site which serves as a repository of add-ons for Mozilla-based applications"? The topic is Add-on.
Answer:
"what are add ons?"