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: 'Served as the general chair of the 20th IEEE International Conference on Software Maintenance held in Chicago during Sept. 11-14th 2004 .', Argument/Subject 1: 'conference', Argument/Subject 2: 'chicago'
hold in

Sentence: 'Rajdhani connects New Delhi with major cities in India .', Argument/Subject 1: 'new delhus', Argument/Subject 2: 'indium'
be city of

Sentence: 'The Muslim holy month of Ramadan , begun Sunday , is observed by fasting from dawn to dusk .', Argument/Subject 1: 'ramadan', Argument/Subject 2: 'muslim'
be month for