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: Dr. Ari Weiss:  I 'm just as concerned about Hamilton 's head as you are , Detective . There must have been a break - in at our storage facility .
Kate Beckett: A break - in . Really ? Is that what you 're going with ?
Dr. Ari Weiss: We 're never had anything like this happen to one of our clients . It 's the only thing that make any sense .
Kate Beckett: No , I will tell you what makes sense , Dr. Weiss . Either you 're part of a cover - up or you 're a murderer or both .
Dr. Ari Weiss: What ? Wh ... why would I kill anyone ? I have a family .
Kate Beckett: Well , then did you take them into consideration when you colluded in moving a body from a murder scene ?
Dr. Ari Weiss: That was a _ one _ in a million circumstance , and everyone ended up getting what they needed .
Kate Beckett: Then why is it at every step of this investigation , you have gotten in my way ? Hamilton ends up dead and in your custody ; the DA 's about to turn over the body to me , and you negotiate to keep the head ; I get a warrant for the head , and suddenly it ends up missing .

circumstance