I see that you just used Google Translate, as 知っている more accurately translates to "knowing" or "_ is knowing" (subjects and objects are frequently omitted in Japanese as the only grammatically necessary piece is the verb). 知れ would more accurate as the "know" is more of an imperative.

Thanks for the heads up. I don't know Japanese (save for a couple spare words) so I used Google to "translate" it.