change category rhythm_game (289) -> invalid
create implication playing_rhythm_game (0) -> playing_videogame (5)
create implication rhythm_game_mechanics (0) -> gameplay_mechanics (10691)
create implication rhythm_game_machine (0) -> arcade_machine (708)
create implication rhythm_game_controller (0) -> game_controller (8738)
create implication dance_pad (27) -> rhythm_game_controller (0)
remove implication guitar_controller (29) -> game_controller (8738)
create implication guitar_controller (29) -> rhythm_game_controller (0)