People walk down a flight of stone steps in public .
It is highly unlikely that people from a tour group walk down a flight of public steps that are made of stone .
There is a better than even chance that people from a tour group walk down a flight of public steps that are made of stone .
It is highly unlikely that people from a tour group walk down a flight of public steps that are made of stone .
People from a tour group walk down a flight of public steps that are made of stone .