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: Amy Farrah Fowler:  You know , if being on your own is new to you , I 'd be happy to share some tension - relieving techniques for ladies that I 've perfected over the years . For example , do you have an electric toothbrush ?
Penny: Uh , no .
Amy Farrah Fowler: You should get _ one _ .

toothbrush