How to make a flag reset?

[SirUnknown]

I'm working on a special delivery map with a death pit, how would I make it where if the flag holder falls in the pit the flag will instantly reset?

 

[Egan]

https://developer.valvesoftware.com/wiki/Func_respawnflag

Here's a list of all the TF2 entities: https://developer.valvesoftware.com/wiki/List_of_Team_Fortress_2_Entities (Ctrl+F to 'Find' a keyword)