change category rhythm_game (280) -> invalid
create implication playing_rhythm_game (0) -> playing_videogame (5)
create implication rhythm_game_mechanics (0) -> gameplay_mechanics (8809)
create implication rhythm_game_machine (0) -> arcade_machine (607)
create implication rhythm_game_controller (0) -> game_controller (7792)
create implication dance_pad (23) -> rhythm_game_controller (0)
remove implication guitar_controller (17) -> game_controller (7792)
create implication guitar_controller (17) -> rhythm_game_controller (0)