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 _ .

Q: (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

A: It's about 5% the size of _ and revolves around the sun every 88 days.
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Q: (CNN) Rep. Keith Ellison's past ties to the Nation of Islam and his defense of its anti-Semitic leader, Louis Farrakhan, are resurfacing as he campaigns to lead the Democratic National Committee. Ellison, the first Muslim elected to Congress, publicly renounced his association with the Nation of Islam in 2006 after it became an issue during his run for Congress, when local Republican bloggers began publishing his old law school columns and photos connecting him to the organization. "I have long since distanced myself from and rejected the Nation of Islam due to its propagation of bigoted and anti-Semitic ideas and statements, as well as other issues," Ellison wrote at the time.Rep. Keith Ellison's past ties to the Nation of Islam are resurfacing as he campaigns for DNC chair.A spokesperson for Ellison told CNN that Ellison "rejects all forms of anti-Semitism."

A: During that race, Ellison rebuffed any insinuation he was, himself, anti-_.
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Q: Washington (CNN) Sen. Ted Cruz signaled Wednesday his interest in slow-walking any new Supreme Court appointments to fill the seat vacated by Antonin Scalia's death, arguing that there is precedent for leaving the ninth seat vacant. "You know, I think there will be plenty of time for debate on that issue," the Texas Republican told reporters gathered after a speech in Colorado, according to The Washington Post. "There is certainly long historical precedent for a Supreme Court with fewer justices. I would note, just recently, that Justice (Stephen) Breyer observed that the vacancy is not impacting the ability of the court to do its job. That's a debate that we are going to have.""I think there will be plenty of time for debate on that issue," he saidRepublicans have refused to hold hearings for nominee Merrick Garland

A:
"Thus, the 'long historical precedent' _ invoked is, in fact, outdated and anachronistic," Vladeck said.
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