Assertion: president's secretary | /r/HasProperty | army chief of staff
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Source sentences:
text: Some of those high-ranking officials, civil and military (outside of OSD and the Joint Staff) are: the secretary of the Army, secretary of the Navy, and secretary of the Air Force, Army chief of staff, commandant of the Marine Corps, chief of naval operations, and Air Force chief of staff, chief of the National Guard Bureau and the combatant commanders of the Combatant Commands.