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].

[EX Q]: (CNN) A submarine is joining the Mediterranean Sea search for the black boxes that could reveal what caused the crash of EgyptAir Flight 804. The aircraft disappeared from radar last week on a flight from Paris to Cairo. Searchers have recovered parts of the plane wreckage, including passengers' personal belongings, life vests, aircraft chairs and even body parts. But they're still scouring the Mediterranean for the plane's fuselage, and for the flight data recorder and cockpit voice recorder -- key pieces of evidence that would likely reveal what went wrong on the flight. Egyptian President Abdel Fattah el-Sisi announced the deployment of the submarine Sunday. It can reach a depth of 3,000 meters (about 9,800 feet), he said.Mourners at a Cairo mosque gather in memory of the plane's pilotEgypt uses submarine to hunt for flight data and cockpit voice recorders 
 Question:The jet had routine maintenance checks in _ before it left for Paris, the airline said.
[EX A]: Cairo

[EX Q]: Hong Kong (CNN) -- Not your average great-great grandfather, Fauja Singh has completed nine 26-mile (42-kilometer) marathons since taking up long-distance running just over a decade ago. On Sunday, the 101-year-old Sikh finished his final competitive race in Hong Kong, putting an end to a sporting career that has raised thousands of dollars for charity and been an inspiration to many around the world. Nicknamed "Turbaned Tornado" by fans for his distinctive traditional headwear, Singh said he began long-distance running in an attempt to lift the depression that engulfed him after he witnessed the death of his son. "I suffered a tragic incident in my life, a traumatic experience; I took up running as a new focus in life. And then marathon running developed from there," he told CNN at a training session before Sunday's race.Fauja Singh, 101, completes final race in Hong KongThe great, great grandfather has run 9 marathonsTook up long-distance running after death of sonAttributes success to love of the sport 
 Question:He completed the 10-kilometer route that wound its way along _'s harborfront in one hour 32 minutes and 28 seconds -- four minutes faster than his time last year despite a small stumble.
[EX A]: Hong Kong

[EX Q]: Washington (CNN) President Donald Trump on Monday vowed the US will "fight to win" in Afghanistan, extending the 16-year campaign there with a promise to beef up the American military presence while ratcheting up pressure on other countries in the region to help turn the tide. In a prime-time address before a crowd of US troops, Trump sought to convince the country that he was applying a different strategy to the enduring Afghan conflict. But he offered few details, sticking to broad outlines -- beating back the Taliban, annihilating terrorists and cracking down on Pakistan's harboring of militants -- that shed little daylight between the current and future US approaches to the 16-year war.Trump offered his plans for the US strategy in Afghanistan on Monday in a primetime addressHis decision comes on the heels of months of internal debate over the scope of the US's ongoing engagement 
 Question:Trump also said the US would continue to work to strengthen Afghan security forces, noting that "the stronger the _ security forces become, the less we will have to do."
[EX A]:
Afghanistan