Assertion: senate | /r/CapableOf | change the rule
Facets:
value: in 1975
type: TEMPORAL
value: due to the difficulty
type: CAUSE
Source sentences:
text: The Senate has a number of options for curtailing the use of the filibuster, including by setting a new precedent, changing the rule itself, or placing restrictions on its use.
text: However, due to the difficulty of obtaining a two-thirds vote, the Senate changed the rule in 1975 and reduced the number of votes required to three-fifths (or 60).