Definition: 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 _. There are several possible answers, you'll need to choose the proper one. Carefully read the given text, pay special attention to the marked number, think about what (unwritten) information the marked number holds inside, choose the most adequate word(s) from the optional answers. If none of them seems right to you, there's also an option for other. If your answer is "REFERENCE", also write the reference entity, otherwise write the implicit option name. Options to choose from are:
REFERENCE: Some object which is being mentioned in the text before or after the target number. The reference answer has a higher priority than any other. If both Reference and another answer are possible, prioritize the Reference.
YEAR: Describing a calendric year
AGE: Describing someone's age
CURRENCY: Reference to some monetary value e.g dollar, euro etc.
PEOPLE: Describing a single/plural persons
TIME: Describing a time of the day. Usually you can add the word o'clock after those numbers.
OTHER: Some other option, which isn't listed here.
Input: Dr. Who:  This seems to be the way , Jamie ! Excuse me ; we 're looking for someone in authority .
Jenkins: Just a moment , Sir . All in good time . Thank you , Madam . Now Sir , your passport please .
Dr. Who: I 've got no time for that . We want to see someone in authority !
Jenkins: I am in authority . Your passport please .
Dr. Who: You do n't understand , we ... we have something important to report !
Jenkins: Yes , Sir . When you 've found your passport . The next one , please .
Jamie: What 's a passport , Doctor ?
Dr. Who: Oh , some sort of official mumbo - jumbo . Look ! We 've just discovered a dead body out there ! Did you hear me ?
Jenkins: Well , sir . If I were you I 'd inform the police .
Dr. Who: Then please tell me where we can find them .
Jenkins: There 's probably a policeman in the main concourse .
Jamie: And where is that ?
Jenkins: Through this door and turn to your left .
Dr. Who: Well thank you . Thank you very much . Come on , Jamie .
Jenkins: May I see your passport , Sir ?
Dr. Who: Well neither of us have passports ! Now does that satisfy you ?
Jenkins: I think you must be mistaken , Sir . You could n't have got on the aircraft without passports .
Dr. Who: What aircraft ?
Jenkins: The _ one _ you arrived on , Sir .
Jamie: We did n't arrive on an aircraft .
Jenkins: Now look here , Sir , this joke has gone on far enough . You know and I know that you must have arrived here on the last inbound flight which was ... Flight number 729 from Madrid .

REFERENCE aircraft