Ice skate does not have a sub-event of swim. Have fun has a sub-event of swim. Break does not have a sub-event of you might kill someone. Play has a sub-event of have fun. Break does not have a sub-event of excercise. Eat hamburger has a sub-event of prune shrub. Play does not have a sub-event of you might kill someone. Ice skate does not have a sub-event of prune shrub. Swim has a sub-event of have fun. Outdoors has a sub-event of play. Break has a sub-event of play. Ice skate has a sub-event of have fun.
Break does not have a sub-event of have fun.