View film at home has a precondition of sit on horse. Know truth has a precondition of be aware. Think has a precondition of be aware. Throw party has a precondition of plan. Throw party does not have a precondition of go to party. Throw party has final subevent clean up mess. Celebrate does not have a precondition of have paint. Celebrate has a precondition of throw party. Know truth does not have a precondition of sit on horse. Celebrate does not have a precondition of go to party. Plan has a precondition of think.
Celebrate has a precondition of throw party.