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].

Example Input: Washington (CNN) -- President Barack Obama used a Memorial Day ceremony to say it is time for America to properly welcome home Vietnam veterans and show them and their families the respect and gratitude they deserved but didn't receive decades ago. "You came home and sometimes were denigrated when you should have been celebrated," Obama said beneath a scorching sun at the Vietnam Veterans Memorial. "It was a national shame, a disgrace that should have never happened. That's why here today, we resolve that it will not happen again." The event, which launched a 13-year Vietnam War 50th anniversary commemoration, was the culmination of a day of somber events on the annual holiday honoring America's war dead.NEW: President Obama calls the denigration of Vietnam veterans a "national shame""America will be there for you," Obama tells veterans and their familiesMemorial Day launches a 13-year commemoration of the Vietnam War's 50th anniversaryObama lays a wreath to the fallen at Arlington National Cemetery 
 Question:This year marks the 50th anniversary of the _ deploying a significant military presence in Vietnam.
Example Output: America

Example Input: The wife of a man jailed for killing his own brother has vowed to stand by her man. Mark Lowe, 32, from Skelmersdale, Lancashire, is currently serving a five-year sentence for beating and kicking his brother Wayne to death, after Wayne, then 33, attacked him in his bed with a knife. Mark's wife Sarah is now looking after three young children alone and said: '[Mark] will regret what he did for the rest of his life, because he loved his brother.' Mark Lowe, 32 (left), is currently serving a five year sentence for beating and kicking his brother Wayne (right) to death, but his wife Sarah (bottom) is standing by her manMark Lowe, 32, beat his brother Wayne, 33, to death last SeptemberWayne, who was known for being violent, attacked Mark in bed with a knifeMum-of-three Sarah Lowe insists her husband, a nurse, is a good manMark is now serving a four year eight month prison sentence 
 Question:'_ had never been in trouble before in his life, so to be sent away on remand was horrific for him.
Example Output: Mark Lowe

Example Input: (CNN) Alex Gentile has a very simple wish. The 8-year-old wants to run with his friends on the playground. But because of a rare disease, he can't play in the sunlight for very long. Alex has X-linked reticulate pigmentary disorder with systematic manifestations -- or what's more commonly called XLPDR. It's so rare that there are only 18 diagnosed cases worldwide. Alex's story is part of photographer Luca Catalano Gonzaga's project, "Hopeful, 'One of a Kind,' " that documents invisible diseases. While many parents pride themselves on being vigilant, it's imperative for Alex's mother, Patrizia, to constantly monitor him. "When he overheats, he risks his life," she said. "A moment of negligence, a delay, and Alex dies."Alex Gentile is one of 18 people on Earth who've been diagnosed with XLPDRThe disorder makes the 8-year-old incredibly sensitive to sunlight 
 Question:Many times, patients with XLPDR are misdiagnosed, like _ was; identifying the gene will help doctors properly diagnose XLPDR patients in the future.
Example Output:
Alex Gentile