Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
As long as this card remains face-up on the field, monsters with an ATK equal to 1900 or more cannot declare an attack.
--ゴラ・タートル
--Gora Turtle
local s,id=GetID()
function s.initial_effect(c)
	--cannot attack
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_CANNOT_ATTACK_ANNOUNCE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetTargetRange(LOCATION_MZONE,LOCATION_MZONE)
	e1:SetTarget(s.atktarget)
	c:RegisterEffect(e1)
end
function s.atktarget(e,c)
	return c:IsAttackAbove(1900)
end