is_viking_society_trigger = { #trigger for members, useful if you have several similar society who all share events so you do not have to make trigger for all of them.
	custom_tooltip = {
		text = IS_viking_society_TRIGGER
		OR = {
			society_member_of = viking_society
			# society_member_of = viking_society_example
			# society_member_of = viking_society_another_one
		}
	}
}