In this task, you will be shown a passage. You need to write a fill-in-the-gap question based on your understanding of the events that might be inferred from the passage. Your question should be answerable based on the passage and only have one correct answer. Show the gap in your question with a _ .
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Question: (CNN) -- X-ray data from NASA's MESSENGER probe points to high levels of magnesium and sulfur on the surface of the planet Mercury, suggesting its makeup is far different from that of other planets, scientists say. The unmanned orbiter has been beaming back data from the first planet for a year and a half. Readings from its X-ray spectrometer point to a planet whose northern volcanic plains formed through upwellings of rocks more exotic than those often found on the Earth, the Moon or Mars, said Shoshana Weider, a researcher at the Carnegie Institution of Washington. "Before this MESSENGER mission, a lot of people assumed it was very like the Moon -- it's dark, it's grey," Weider said. But while the Moon's surface formed when light materials floated to the top of an ocean of molten rock, the low level of calcium on Mercury indicates that didn't happen there.NASA probe gives insight into Mercury's formationThe surface has sulfur levels 10 times higher than Earth'sThe MESSENGER orbiter has been circling Mercury since March 2011

Answer: It's about 5% the size of _ and revolves around the sun every 88 days.


Question: Philadelphia (CNN) Hillary Clinton's campaign manager is alleging that Russian hackers are leaking Democratic National Committee emails critical of Bernie Sanders in an effort to help Donald Trump win the election in November. It comes on the heels of "changes to the Republican platform to make it more pro-Russian," Robby Mook told CNN's Jake Tapper on "State of the Union" Sunday. Clinton says there is an unfair 'Hillary standard' on trust and honesty "I don't think it's coincidental that these emails were released on the eve of our convention here, and I think that's disturbing," he said. Michael Bloomberg to endorse Hillary ClintonRobby Mook says Russian hackers released DNC emails to help Donald TrumpThe email release comes on the eve of the Democratic National Convention

Answer: _'s campaign seized on Mook's comments, using them to attack Clinton as a candidate who "will do and say anything" to win.


Question: Stargazers were treated to a rare phenomenon this morning when a stunning light show hit earth illuminating the sky in parts of Australia. Photographers and space enthusiasts flocked to Sydney's northern beaches and the coast of Victoria to capture the mesmerising pink, green and orange hues which were projected on to earth from the Aurora Australis. 'I thought it was actually some light reflecting from nearby power stations at first until I saw it on the camera,' photographer Caitlin Gordon told ABC Gippsland from a farm outside Taralgon on Tuesday. The photographer was up at the crack of dawn, making sure she had her camera at the ready for the solar storm which occurred at 5am on Tuesday morning.Australia was treated to a light show in the form of the Aurora Australis on Tuesday morningIt occurred just before 5am and was captured in NSW, Victoria and across other parts of AustraliaThe phenomenon is a rare treat for light enthusiasts in Australia however experts believe it may be backElectrically charged particles from the sun entered the Earth’s atmosphere and created the stunning coloursIt creates a stunning green, orange or pink hue over earth's skyline, leaving a kaleidoscope of colours

Answer:
'And now the lights have made it all the way to _.