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. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.
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Question: DENVER, Colorado (CNN) -- Sen. Barack Obama laid out his plan for change in America as he accepted the Democratic presidential nomination Thursday night, securing his place in history as the first African-American to lead a major party ticket. Sen. Barack Obama accepted his party's nomination for the presidency Thursday night. "Change happens because the American people demand it -- because they rise up and insist on new ideas and new leadership, a new politics for a new time. America, this is one of those moments," he told supporters at the Democratic National Convention. "I believe that as hard as it will be, the change we need is coming."Barack Obama pits himself against John McCainObama lays out roadmap for improving the economyTens of thousands pile into Invesco Field to watch the speechAl Gore urges Americans to vote for change; vote for Obama 
 Questions:He wrapped up his speech by telling the crowd, "_, we cannot turn back. (A) DENVER (B) Colorado (C) CNN (D) Barack Obama (E) America (F) Democratic (G) Change (H) Democratic National Convention (I) John McCain (J) Obama (K) Invesco Field (L) Al Gore

Answer: (E)


Question: (CNN)Politicians, journalists and conservative activists will swoop into Des Moines this weekend for a major gathering of Republicans that's widely viewed as the first cattle call this cycle for the GOP presidential race. Close to 10 potential candidates will speak at the daylong Iowa Freedom Summit on Saturday, co-hosted by the group Citizens United and Rep. Steve King, a high-profile Republican from Iowa with serious clout among social conservatives. With Iowa the first state to vote in the presidential nominating season, it's considered a must-stop for White House hopefuls on both sides of the aisle, and this weekend gives 2016 players a chance to roll out their message to core caucus-goers, strategists say.Potential GOP presidential candidates will gather in Iowa this weekendThe state holds the nation's first presidential nominating contest next year 
 Questions:Also on the social front, the House, in a battle that pitted _ against each other, passed a measure Thursday banning all taxpayer money for abortions after it failed to pass a bill that would ban so-called "late -term" abortions. (A) CNN (B) Des Moines (C) GOP (D) Iowa Freedom Summit (E) Citizens United (F) Steve King (G) Iowa (H) White House

Answer: (C)


Question: (CNN) Can an old war horse that dates back more than 40 years hold its own against the newest warbird loaded with the latest in technology and weaponry? The Pentagon said it aims to find out and will pit the venerable A-10 Warthog against the F-35 Lightning Joint Strike Fighter in a series of rigorous tests replicating what the planes would face in battle. "We are going to do a comparative test of the ability of the F-35 to perform close air support, combat search-and-rescue missions and related missions with the A-10," Michael Gilmore, the Pentagon's director of operational test and evaluation, told a Senate Armed Service Committee hearing on Tuesday.Pentagon wants to show F-35's improved capability"If you asked an A-10 to do air-to-air, it's hopeless," Pentagon official says 
 Questions:"The _ will not do close air support mission the same way the A-10 does. (A) Pentagon (B) A-10 Warthog (C) F-35 Lightning Joint Strike Fighter (D) A-10 (E) Michael Gilmore (F) Senate Armed Service Committee

Answer:
(C)