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.

NEW YORK (CNN) -- John McCain has learned his lesson: Don't ever cancel on David Letterman. Appearing on CBS' "Late Show with David Letterman" Thursday, the Republican presidential candidate apologized for skipping out on a scheduled visit in September that Letterman later made the subject of an ongoing joke. "I screwed up," McCain told Letterman more than once in the interview that aired Thursday night. McCain's appearance on the show comes three weeks after he raised the ire of the generally mild-mannered host by canceling at the last minute, citing his decision to suspend his presidential campaign because of the financial crisis."I screwed up," John McCain tells David Letterman for canceling scheduled visitLetterman used McCain's no-show as subject of ongoing jokeMcCain also discussed Sarah Palin, Obama's ties to 1960s' radical William Ayers 
 Questions:When Letterman asked McCain about Palin's charge that _ "palled around with terrorists," the senator said "he did." (A) NEW YORK (B) CNN (C) John McCain (D) David Letterman (E) CBS (F) Late Show (G) Republican (H) Letterman (I) McCain (J) Sarah Palin (K) Obama (L) William Ayers
(K)

NASA has given the people of Earth a rare treat: A color mosaic that captures not only Saturn, but also the tiny dots of Earth and other planets in the background. The panorama, released Tuesday, was captured by the Cassini spacecraft on July 19, when the sun slipped behind the ringed planet. Earth appears as a bright blue dot to Saturn's lower right, just above Saturn's outer, halo-like E-ring. Venus is a dot to the upper left, with Mars appearing as a faint red dot above and to the left of Venus. This is the first image in which Saturn, its moons and rings, and Earth, Venus and Mars are all visible, NASA said. The image -- a panorama of 141 wide-angle pictures -- covers 404,880 miles across Saturn and its ring system.Image is Cassini's first showing Saturn, rings, moons, Earth, Venus and Mars at same timeThe collage is panorama of 141 wide-angle pictures taken July 19Image was possible that day because Saturn obstructed spacecraft's view of sun 
 Questions:NASA hopes to have it continue to get more pictures and other data of _, its rings and moons through 2017. (A) NASA (B) Earth (C) Saturn (D) Cassini spacecraft (E) Venus (F) Mars (G) Cassini
(C)

Los Angeles (CNN) -- Keya Morgan sometimes sleeps with Abraham Lincoln's pocket watch clutched in his hand or with Marilyn Monroe's dress next to him. It makes for amazing dreams, he says. It also puts Morgan -- owner of a vast array of historical photos, documents and objects -- at the nexus of celebrity, conspiracy and collectibles. He's friends with an unusual array of famous people, many of whom he met while gathering his artifacts and information. Michael Jackson was among them. Marina Oswald still is. The widow of the man accused of assassinating President John F. Kennedy says she's spent hours discussing history with Morgan, who owns the largest private collection of photos of JFK.Keya Morgan collects historical artifacts from celebsHis work has helped him develop relationships with the starsMorgan says he "time travels" using some of the items he has 
 Questions:When Morgan gave Jackson a ring that once belonged to Monroe, _ returned the favor by teaching him his trademark dance step. (A) Los Angeles (B) CNN (C) Keya Morgan (D) Abraham Lincoln (E) Marilyn Monroe (F) Morgan (G) Michael Jackson (H) Marina Oswald (I) John F. Kennedy (J) JFK

(G)

