Indicator is part of Car. Indicator is derived from Indicate. Indicate is a synonym of Display. Display is a synonym of Suggest. 
Sigh is related to Air. Air is a synonym of Broadcast. 
Car <--PartOf-- Indicator --DerivedFrom--> Indicate <--Synonym--> Display <--Synonym--> Suggest 
Sigh <--RelatedTo--> Air <--Synonym--> Broadcast 