BUR #38765 has been approved by @nonamethanks.
create implication on_swing -> swing
create implication standing_on_swing -> on_swing
create implication standing_on_swing -> standing
create implication swinging_on_swing -> on_swing
To be on a swing, there needs to be a swing. To be standing on a swing you must be on a swing while standing. While swinging on a swing you must be on a swing.
4:30am while new to BURs, let me know if I made a mistake