if "%world of player%" is "Invasion":
command /invasion <text>:
trigger:
if arg-1 is "healer":
player has permission "invasion.createhealer"
spawn a priest
set {healer.%spawned villager%} to true
on rightclick on a priest:
cancel event
player has permission "invasion.usehealer"
player is holding a gold nugget
{healer.%clicked villager%} is true
player's health is below 9.5
player has 32 gold nuggets
remove 32 gold nuggets from the player
heal the player
send "{@prefix} &aYou have been healed" to player


The error i am getting is "can't understand this event: 'if %world of player% is "Invasion" ' "