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: Hercule Poirot:  Do you think Shaitana played any card games ?
Major Despard: There is only one game that Shaitana played ... a low - down game . We all make mistakes . Even you , I dare say , have a failure now and then .
Hercule Poirot: Well , the last _ one _ was 28 years ago .

failure