TASK 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.
PROBLEM: Emily Prentiss:  Look ... You lost your mother when you were very young . It would have been too devastating to lose your father as well . Repressing those memories is a defense mechanism .
Samantha Allen: So ... Um ... What else did I bury ?
Emily Prentiss: His mood swings , probably . Do you remember when he was happy one day , angry the next ?
Samantha Allen: Yeah .
Emily Prentiss: And when his moods were extreme , did he give you gifts ?
Samantha Allen: How do you know that ?
Emily Prentiss: What did he give you ?
Samantha Allen: A bike , once .
Emily Prentiss: Was that _ one _ that you had asked for ?
Samantha Allen: No , it was a BMX .
Emily Prentiss: And others ?
Samantha Allen: My catcher 's mitt from today .

SOLUTION: bike

PROBLEM: Linka:  We need a plumber , and fast .
Kwame: I know _ one _ who is always on call . Let our powers combine !

SOLUTION: plumber

PROBLEM: Leo:  You know , you guys can hassle your skinny friend Eric , but when it comes down to a fundamental moral core he 's the only one of you that 's got _ one _ . So congratulations , you 've ruined Christmas .

SOLUTION:
core