I want to know the answer to the following question:
For seamless connection of multimodal transport, where are many large airports located?
All the background I'm provided with is that "Many large airports are located near railway trunk routes for seamless connection of multimodal transport, for instance Frankfurt Airport, Amsterdam Airport Schiphol, London Heathrow Airport, London Gatwick Airport and London Stansted Airport.". Is that enough to answer the question?