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: Sub-Commander T'Pol:  It 's a thermo - kinetic analysis of the moons . Each of them undergoes extreme temperature variations during their orbits .
Captain Jonathan Archer: Go on .
Sub-Commander T'Pol: At night , it can drop to five or even ten degrees below _ zero _ .
Captain Jonathan Archer: That does n't sound so bad .
Sub-Commander T'Pol: During the day , the temperature can rise to as high as 170 degrees .
Captain Jonathan Archer: We better hope that Trip landed on the night side .
Sub-Commander T'Pol: And that we find him before the sun rises .

degrees