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: 'We reported earlier this week that Obama is keeping his Blackberry for personal use and now BoyGeniusReport is reporting the rumor that he 'll be using a Sectera Edge for official business .', Argument/Subject 1: 'obama', Argument/Subject 2: 'blackberry'
Output:
keep