In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].

Washington (CNN) Ohio Democratic Rep. Tim Ryan is calling his bid to oust Nancy Pelosi a "David versus Goliath" type clash -- a back bencher competing against the top House Democrat who made history in 2007 when she was sworn in as the first female speaker of the House. "If you're a quarterback and you keep throwing interceptions, you change quarterbacks," the 43-year-old Ryan, a former high school football player, said in a recent interview criticizing the record of Pelosi, 76, and arguing it's time for a younger generation to take the reins. Ryan's gambit is unusual because most leadership challenges come from members using another party position or a top slot on a key committee as a launching pad.Ryan is in his 7th term, but hasn't been a national leader for DemocratsYounger Democrats are unhappy with the lack of opportunities to advance in party leadershipPelosi is expected to fend off Ryan's challenge 
 Question:Ryan and other _ who pressed for more time before the vote point out that there is basically no bench for House Democrats.
Democratic

Washington (CNN) The advertised purpose of President Barack Obama's pre-vacation news conference Thursday was to highlight gains in the war against ISIS in Iraq and Syria with the Pentagon as a backdrop. But for all his talk of terrorism, Russia and other geopolitical challenges, the underlying argument he wanted to make was clear: it's a serious business being commander-in-chief and the Republican who wants his job isn't fit for the Oval Office. Obama ridiculed Donald Trump's recent suggestion that the election system could be rigged, called on the candidate to act like a president since he's soon to be briefed on confidential information and implied that he didn't believe the billionaire businessman could be trusted with America's nuclear codes.Obama hit out at Trump just two days after branding him unfit to be commander in chiefTrump and Clinton are expected to soon start getting classified intelligence briefings 
 Question:Obama pointed to many such challenges in Thursday's _ news conference, particularly the fight against ISIS, also known as ISIL.
Pentagon

(CNN) In response to recent guidance by the American Medical Association against the use of powerful LED lights, cities such as Phoenix; Lake Worth, Florida; and 25 towns in Connecticut are now opting for street lamps with lower color temperatures, meaning less blue light emission. The association's policy statement, released in June, suggested that LED lights with color temperatures higher than 3000 Kelvin had adverse effects on health, including eye damage and disrupted sleep patterns. The warning was aimed at large cities, where the standard color temperature for LED street lights is 5000K to 6000K. Lights with high color temperatures release more blue light, which cause more glare and discomfort to the eyes, according to the association.The American Medical Association recommends LED lights with less blue lightSome cities are replacing street lamps to improve public health 
 Question:Longcore suggests using high-_ in areas known for criminal activity and less intense lights elsewhere.

LED

