Task: Question Answering
Input (English): Sentence: In the context of a Stryker Brigade Combat Team 's Infantry Rifle Companies , one man from each fireteam in a rifle squad is either the Squad Anti-armor Specialist , armed with the FGM-148 Javelin , or the Squad Designated Marksman , who carries the M4 carbine and M14 rifle . 
 Question: when is someone armed  with something?
Output (English): In the context of a Stryker Brigade Combat Team 's Infantry Rifle Companies