In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

Example Input: In a duel-input USB cable, what are both cables used for?, Context: Some USB devices require more power than is permitted by the specifications for a single port. This is common for external hard and optical disc drives, and generally for devices with motors or lamps. Such devices can use an external power supply, which is allowed by the standard, or use a dual-input USB cable, one input of which is used for power and data transfer, the other solely for power, which makes the device a non-standard USB device. Some USB ports and external hubs can, in practice, supply more power to USB devices than required by the specification but a standard-compliant device may not depend on this.
Example Output: power

Example Input: Who practices SODIS?, Context: Solar water disinfection (SODIS) involves exposing water-filled plastic polyethylene terephthalate (PET) bottles to sunlight for several hours. Exposure times vary depending on weather and climate from a minimum of six hours to two days during fully overcast conditions. It is recommended by the World Health Organization as a viable method for household water treatment and safe storage. Over two million people in developing countries use this method for their daily drinking water.
Example Output: Over two million people

Example Input: What country is closest to the US., Context: Countries in the top quartile of HDI ("very high human development" group) with a missing IHDI: New Zealand, Singapore, Hong Kong, Liechtenstein, Brunei, Qatar, Saudi Arabia, Andorra, United Arab Emirates, Bahrain, Cuba, and Kuwait.
Example Output:
Cuba

