Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If your opponent controls 2 or more monsters, you can Normal Summon this card without Tributing. If you control "Panther Shark", you can Special Summon this card (from your hand). You can only control 1 "Eagle Shark".
--イーグル・シャーク
--Eagle Shark
local s,id=GetID()
function s.initial_effect(c)
	c:SetUniqueOnField(1,0,id)
	--summon with no tribute
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_SUMMON_PROC)
	e1:SetCondition(s.ntcon)
	c:RegisterEffect(e1)
	--spsummon
	local e2=Effect.CreateEffect(c)
	e2:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetRange(LOCATION_HAND)
	e2:SetCode(EFFECT_SPSUMMON_PROC)
	e2:SetCondition(s.spcon)
	c:RegisterEffect(e2)
end
s.listed_names={70101178}
function s.ntcon(e,c,minc)
	if c==nil then return true end
	return minc==0 and c:GetLevel()>4 and Duel.GetLocationCount(c:GetControler(),LOCATION_MZONE)>0
		and Duel.GetFieldGroupCount(c:GetControler(),0,LOCATION_MZONE)>1
end
function s.filter(c)
	return c:IsFaceup() and c:IsCode(70101178)
end
function s.spcon(e,c)
	if c==nil then return true end
	return Duel.GetLocationCount(c:GetControler(),LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.filter,c:GetControler(),LOCATION_MZONE,0,1,nil)
end