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: Captain Jack Harkness:  It 's 1941 . The height of the London Blitz . The height of the German bombing campaign . But something else has fallen on London , a fully - equipped Chula warship . The last _ one _ in existence , armed to the teeth . And I know where it is . Because I parked it . If the Agency can name the right price , I can get it for you . But in two hours , a German bomb is gon na fall on it and destroy it forever . That 's your deadline . That 's the deal . Now , shall we discuss payment ?

warship