Sleep has a sub-event of dream. Smoke has a sub-event of sing carol. Attend lecture does not have a sub-event of use phone. Attend lecture has first subevent find seat. Dream does not have a sub-event of use phone. Act strange has a sub-event of sing carol. Dream has a sub-event of snore. Snore has a sub-event of breathe in. Attend lecture does not have a sub-event of feel bad. Smoke has a sub-event of breathe in. Attend lecture has a sub-event of sleep.
Dream has a sub-event of breathe in.