Instructions: 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.
Input: Sentence: 'Two million children in Sudan 's troubled Darfur region have been immunized against measles , but as many as 500,000 others are without vaccinations because it is too dangerous for health workers to reach them .', Argument/Subject 1: 'darfur', Argument/Subject 2: 'sudan'
Output:
be region in