Given the task definition and input, reply with output. Given a sentence and two mentions from the text (arguments), indicate a phrase (a verb or noun phrase) that describes the relationship between the provided arguments.

Sentence: 'France has always been a crossroads of Europe , so it should be no surprise that French wedding customs are a rich mix of customs from other cultures together with those nurtured in the most romantic country in the world .', Argument/Subject 1: 'france', Argument/Subject 2: 'europe'
be crossroads of