Random key from dictionary does not recognize it's value when entered as an input

Trying to do this through dictionary but it is not working. Is there a solution to this? The assignment is user asked to guess the capital of a randomly chosen country from dictionary. When user writes the answer, it will be turned into value and checked if matches with country key.

import random
capitals = {'England': 'London', 'Spain': 'Madrid', 'France': 'Paris'}
rand= (random.choice (list(capitals)))
for i in capitals:
        inp= input("what's is the capital of "+rand+ ":   ")
        if inp.upper()==capitals[i].upper():
            print ("correct")
            break
        else:
            print ("think again")