need help with selectors using /tellraw

Im trying to send a tellraw in chat using two selectors. I found online this format: {"text":"","color":"blue","extra":[{"selector":"@p"},{"text":" has won the game!"}]}, and also this format: {"text":"You Have Been Sacrificed By: ","color":"dark_red","extra":[{"selector":"@s"}]}, but i want to put a se;ector at the beginning and end, so the message will look something like this @p has been sacrificed by @s