In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.

Ex Input:
Avalon Harmonia: The world scares you . So you wrap it up neatly in bonds of reason , education and proof . All riddles are solvable to you , except for _ one _ .
Dr. Temperance 'Bones' Brennan: Yes . The riddle of how you knew where your sister was buried .
Avalon Harmonia: No , the riddle you ca n't solve is how somebody can love you .
Dr. Temperance 'Bones' Brennan: Well I 'm beautiful and very intelligent .
Avalon Harmonia: The answer to the question that you 're afraid to say out loud is : yes . He knows the truth about you . And he is dazzled by that truth .

Ex Output:
riddles

Ex Input:
Nathan: So , do you know what the Turing Test is ?
Caleb: Yeah . I know what the Turing Test is . It 's when a human interacts with a computer and if the human does n't know they 're interacting with a computer , the test is passed .
Nathan: And what does a pass tell us ?
Caleb: That the computer has artificial intelligence . Are you building an AI ?
Nathan: I 've already built _ one _ .

Ex Output:
AI

Ex Input:
Jesse James: Give me some more conversations , Bob .
Charley Ford: I got _ one _ . This one 's about as crackerjack .
Jesse James: Let Bob tell it .
Robert Ford: I do n't even know what you 're talking about .
Charley Ford: About how much you and Jesse have in common .
Jesse James: Go on , Bob .
Charley Ford: Tell a story .
Robert Ford: Nope . Nope .
Charley Ford: Entertain Jesse . He 's here .
Robert Ford: Well , if you 'll pardon my saying so , I guess it is interesting , the many ways you and I overlap and whatnot . You begin with our Daddies . Your daddy was a pastor of the New Hope Baptist Church ; my daddy was a pastor of a church at Excelsior Springs . Um . You 're the youngest of the three James boys ; I 'm the youngest of the five Ford boys . Between Charley and me , is another brother , Wilbur here , with six letters in his name ; between Frank and you was a brother , Robert , also with six letters . Robert is my Christian name . You have blue eyes ; I have blue eyes . You 're five feet eight inches tall . I 'm five feet eight inches tall . Oh me , I must 've had a list as long as your nightshirt when I was twelve , but I 've lost some curiosities over the years .
Jesse James: Ai n't he something ?

Ex Output:
conversations