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.
--------
Question: Sentence: 'CHArt 's seventeenth annual conference , held at the British Academy in London on 28th and 29th November 2001 , considered Digital Art History as a subject in transition , its opportunities and problems .', Argument/Subject 1: 'conference', Argument/Subject 2: 'london'

Answer: be hold in

Question: Sentence: 'He also said that a nuclear-armed Iran would be a threat to both Israel and the United States .', Argument/Subject 1: 'israel', Argument/Subject 2: 'iran'

Answer: be threat to

Question: Sentence: 'Arizona is one the best states in the United States for hiking .', Argument/Subject 1: 'arizona', Argument/Subject 2: 'unite state'

Answer:
be state in