In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

Example Input: As of 2016, there are 3 hydrogen cars publicly available in select markets: the Toyota Mirai, the Hyundai ix35 FCEV, and the Honda Clarity. Several other companies are working to develop hydrogen cars. As of 2014, 95% of hydrogen is made from natural gas. It can be produced using renewable sources, but that is an expensive process. Integrated wind-to-hydrogen (power-to-gas) plants, using electrolysis of water, are exploring technologies to deliver costs low enough, and quantities great enough, to compete with hydrogen production using natural gas. The drawbacks of hydrogen use are high carbon emissions intensity when produced from natural gas, capital cost burden, low energy content per unit volume, production and compression of hydrogen, and the large investment in infrastructure that would be required to fuel vehicles.
Example Output: where do scientists hope to get hydrogen to use in cars

Example Input: Scholars of Greek consider its writing to be more polished and eloquent than any other book of the New Testament. The book has earned the reputation of being a masterpiece. It has also been described as an intricate New Testament book. Scholars believe it was written for Jewish Christians who lived in Jerusalem. Its purpose was to exhort Christians to persevere in the face of persecution. At this time, certain believers were considering turning back to Judaism (the Jewish system of law) to escape being persecuted for accepting Christ as their saviour, now following this system of grace (saved by Jesus' sacrifice on the cross). The theme of the epistle is the doctrine of the person of Christ and his role as mediator between God and humanity.
Example Output: who was the book of hebrew written to

Example Input: In economics, an inferior good is a good whose demand decreases when consumer income rises (or demand rises when consumer income decreases), unlike normal goods, for which the opposite is observed. Normal goods are those for which demand rises as consumer income rises. This would be the opposite of a superior good, one that is often associated with wealth and the wealthy, whereas an inferior good is associated with lower socio-economic groups.
Example Output:
when is a good considered an inferior good