One partner should put on the safety goggles and get down on the floor so she or he can see which ball hits the ground first.
(One partner; should put; on the safety goggles) (One partner; get; down; so she or he can see which ball hits the ground first) (she or he; can see; which ball hits the ground first) Context(she or he can see,List([74, 91))):(which ball; hits first; the ground)
she or he can see,List([74, 91))
One partner One partner she or he which ball
should put get can see hits first
on the safety goggles
down so she or he can see which ball hits the ground first
which ball hits the ground first
the ground