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: M.E. Sidney Perlmutter:  I checked the victim for any implants or traceable medical hardware , but I discovered nothing that would aid you in your quest . However , I did find a telling mark on her body .
M.E. Sidney Perlmutter: This
M.E. Sidney Perlmutter: is a very unusual scar . My guess is she sustained the injury ten or twelve years ago .
Richard Castle: Right about the time she was sent to the orphanage .
Kate Beckett: In what way is the scar unusual ?
M.E. Sidney Perlmutter: Uh , she took shrapnel . Based on faint , small scars over her back and legs , it was from some kind of explosion , like an IED .
Kate Beckett: You 're not saying she was in combat as a ten year girl ?
M.E. Sidney Perlmutter: Improbable , but this much I know : she was treated by a U.S. military surgeon .
Kate Beckett: And you know that based on what ?
M.E. Sidney Perlmutter: Uh , this open type of stippled scarring is the result of a technique called debriding . Uh , military surgeons started using it on blast wounds during the Afghan war , saved a lot of lives . But it was n't adopted by civilian doctors until fairly recently . Only two military facilities in Japan were doing this surgery at that time . One at a base in Yokosuka and _ one _ in Okinawa .
Kate Beckett: Okinawa ?
Kate Beckett: That
Kate Beckett: 's where Saito 's Yakuza clan came from .

facilities