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: Lanie Parish:  Multiple GSWs , entries look fairly small caliber . Probably a 0.22 .
Kate Beckett: " Psycho , the rapist , your out of time " ?
Lanie Parish: Looks like a patient lost their patience .
Richard Castle: Also his command of grammar . " Your " should be " you 're " , as in " you are " . That 's not even a tough _ one _ . Not like when to use " who " or " whom " .
Kate Beckett: Do you really think that 's the takeaway here , Castle ?
Richard Castle: I 'm just saying whoever killed her also murdered the English language .

grammar