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: Kate Beckett:  Do you have a cause of death ?
M.E. Sidney Perlmutter: It was a burn . A burn that penetrated tissue , muscle , and bone , leaving this perfectly cylindrical hole .
Kate Beckett: What kind of burn does that ?
M.E. Sidney Perlmutter: Well , _ one _ created by high levels of infrared radiation . The blood vessels were cauterized by the intense heat .
Kate Beckett: Are you saying ...
Richard Castle: She was killed by a phaser ?
M.E. Sidney Perlmutter: Well , as much as it pains me , Mr. Castle is largely correct . She was killed by a high intensity laserbeam .
Richard Castle: A real sci - fi murder at a sci - fi convention ! This keeps getting better .

burn