stem: be sad cry
choice: fall asleep attend lecture
choice: pipe smoke
choice: play sport injury
choice: tire fill with air
choice: sun burn your skin
choice: human sex
choice: earth universe
choice: lisp program language
choice: sleep you be tire
choice: horseback ride fun
choice: dog be pet
choice: heart love
choice: attend lecture fall asleep
choice: earth world
choice: cup glass
choice: do some exercise do cool-down
choice: water plant get water
choice: crime conduct trial
choice: fish lake