>>> print(entrance)
a room with a sense of potentiality. [a rusty iron key, a door with a lock (you'll need a key to open it)]
>>> key, door = entrance
>>> print(key)
a rusty iron key
>>> print(door)
a door with a lock (you'll need a key to open it)
>>> end = door.open(key)
>>> print(end)
a room with a sense of finality. []
>>>