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.
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Question: The Doctor:  I 'm sorry to tell you that Romana can look after herself . We 're Time Lords . Not like those innocents on Atrios , you know . Time Lords , sent by the Guardian to recover the Key to Time .
The Shadow: I know who you are , Doctor , I have always known . I have been waiting for you . I too serve a Guardian , a Guardian equal and opposite in power to the _ one _ you serve . The Black Guardian - he who walks in darkness . And you are in the valley of the Shadow !

Answer: Guardian


Question: Don Cordova:  Same old Daph .
Daphne Wayne: Oh , same old Don . Still making love to every girl that you meet ?
Don Cordova: Oh , no . I miss _ one _ - occasionally .

Answer: girl


Question: Guru Pathik:  The greatest illusion of this world is the illusion of separation . Things you think are separate and different are actually _ one _ and the same .
Aang: Like the four nations .
Guru Pathik: Yes . We are all one people , but we live as if divided .

Answer:
Things