Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

Ex Input:
An Australian inventor has designed and built an environmentally friendly ferry that uses solar and wind power to transport people around Sydney Harbor. Robert Dane and his Solar Sailor were given the top prize at the Australian Design Awards recently. The Solar Sailor has been in use for six months. It uses four sources of energy for its power -- solar, wind, battery power with stored solar energy and a fuel generator in store all controlled by computers. The ferry can travel up to 7.5 knots on just wind and solar power. It's solar wings and fiberglass solar panels which not only take in sunlight and store it in batteries, but also act as sails. "We angle our solar panels to the sun in two planes , which increases the amount of energy we get from the sun by 40 percent," Dane says. "And also we can use that same structure to do another job, which is also the sail, and so these wing sails actually push the ferry forward just like a soft sail does." Computers check the sun and wind and angle the solar wings to take in the most sunlight. If there isn't much wind or it is a cloudy day, energy stored in the batteries runs the electric motor for up to five hours. "If the batteries are too low, then the computer turns the generator on so the boat is always able to meet a commercial schedule, or get from point A to point B no matter what," Dan explains. Dane got his idea for the Solar Sailor from a book on insects. He was amazed how insects use their wings to collect solar energy to warm themselves. "When I read that, I realized there was a good example in nature for what we were going to do, which was to use a solar wing to collect solar energy and also to sail," he says.

Ex Output:
What is the Solar Sailor?


Ex Input:
The DeLorean DMC-12 (commonly referred to simply as the DeLorean as it was the only model ever produced by the company) is a sports car manufactured by John DeLorean's DeLorean Motor Company for the American market from 1981--83.

Ex Output:
What year did DeLorean DMC-12 start?


Ex Input:
According to a new US study, couples who expect their children to help care for them in old age should hope they have daughters because they are likely to be twice as attentive overall. The research by Angelina Grigoryeva, a sociologist at Princeton University, found that, while women provide as much care for their elderly parents as they can manage, men do as little as they can get away with and often leave it to female family members. Her analysis of the family networks of 26,000 older Americans concluded that gender is the most important predictor of whether or not people will actively care for elderly parents. In a paper being presented at the annual conference of the American Sociological Association in San Francisco, she concludes that simply having a sister makes men statistically likely provide less care. Using data from the University of Michigan Health and Retirement Study, a study which has been tracking a cross-section of over-50s for the last decade, she calculated that women provide an average of 12.3 hours a month of care for elderly parents while men offer only 5.6 hours. "Whereas the amount of elderly parent care daughters provide is associated with limitations they face, such as employment or childcare, sons'caregiving is associated only with the presence or absence of other helpers, such as sisters or a parent's spouse ," she explained. "Sons reduce their relative caregiving efforts when they have a sister, while daughters increase theirs when they have a brother." "This suggests that sons pass on parent caregiving responsibilities to their sisters." In the UK, the 2011 census showed that there are now around 6.5 million people with caring responsibilities - a figure which has risen by a tenth in a decade. But many are doing so at the risk of their own health. The census showed that those who provide 50 hours or more of care a week while trying to hold down a full- time job are three times more likely to be struggling with ill health than their working counterparts who are not carers.

Ex Output:

What's the most important factor to predict if people will actively care for the elderly?