you are likely to find Lobby in/at/on Opera. Lobby is related to Entrance. you are likely to find Entrance in/at/on Stadium. 
Tuck is a synonym of Insert. Sandwich is a type of Insert. Sandwich is a type of Organize. 
Opera <--AtLocation-- Lobby <--RelatedTo--> Entrance --AtLocation--> Stadium 
Tuck <--Synonym--> Insert <--IsA-- Sandwich --IsA--> Organize 