Assertion: president | /r/CapableOf | found the need
Facets:
value: for a chief of staff
type: OTHER
value: since least 1979
type: TEMPORAL
Source sentences:
text: However, since at least 1979, all presidents have found the need for a chief of staff, who typically oversees the actions of the White House staff, manages the president's schedule, and decides who is allowed to meet with the president.