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: Special Agent Seeley Booth:  Hey ! Oh , is that my bureau assessment , you 're filling out ?
Dr. Temperance 'Bones' Brennan: Yes , they want me to , because we 're partners
Dr. Temperance 'Bones' Brennan: Oh
Dr. Temperance 'Bones' Brennan: But you 're not allowed to look at it ! It 's confidential
Special Agent Seeley Booth: What are all those , uh , papers there ?
Dr. Temperance 'Bones' Brennan: This is my answer to question 3a
Special Agent Seeley Booth: 3a ? They only have three little lines for that !
Dr. Temperance 'Bones' Brennan: It says : use additional paper if necessary
Special Agent Seeley Booth: These are at least 15 pieces of paper
Dr. Temperance 'Bones' Brennan: _ 18 _ !

pieces