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 _. Your answer should be chosen from the given text, and should not contain other words.
Input: Howard Hughes:  Power coming up !
Glenn Odekirk: Power coming up !
James McNamara: Howard Hughes has just alerted us . Asked everyone to hold on . Tremendous horsepower kicking up .
Howard Hughes: Let me hear it , Odie !
Glenn Odekirk: 25 miles per hour ! 30 !
James McNamara: Here we go . Here we go ...
Glenn Odekirk: 35 !
James McNamara: ... The airspeed indicator has moved up to 25 ... 30 ... 35 ...
Glenn Odekirk: 40 !
James McNamara: ... As he pushes the throttle , that 's _ 40 _ ...
Glenn Odekirk: 45 !
James McNamara: ... 45 . More throttle . That 's 45 ...
Glenn Odekirk: 50 !
James McNamara: ... 50 . It 's 50 over a choppy sea ...
Glenn Odekirk: 55 !
James McNamara: ... 55 . That 's 55 ...
Glenn Odekirk: 60 !
James McNamara: ... More throttle , that 's 60 ...
Glenn Odekirk: 65 !
James McNamara: ... 65 !
Glenn Odekirk: 70 !
James McNamara: ... That 's 70 ...
Glenn Odekirk: 75 !
James McNamara: ... 75 ! And something momentarily cuts out , I believe we are airborne . We are airborne , ladies and gentlemen . I do n't believe Howard Hughes meant this to be , I do n't know . And we were up in the air . We were clearly up in the air .
James McNamara: Ladies and gentlemen , the Hughes mammoth aircraft has flown this afternoon in Los Angeles harbor . And it will personally look , at this moment , that Howard Hughes will be around in the United States for some time to come .

airspeed