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: 'The brass at ICE , which is part of the Department of Homeland Security , apparently had some concerns initially about the House of Death murders and the role Gaudioso might have played in facilitating the bloodshed .', Argument/Subject 1: 'ice', Argument/Subject 2: 'department of homeland security'
be part of