Satisfy appetite with minimum effort has a sub-event of minute be write. Class has a sub-event of study. Read book has a precondition of turn on light. Stand in queue does not have a sub-event of minute be write. Read book has a sub-event of drink. Drink has a sub-event of suck. Study does not have a sub-event of slip. Stand in queue has a sub-event of suck. Class does not have a sub-event of be train. Class does not have a sub-event of slip. Study has a sub-event of read book.
Class does not have a sub-event of drink.