What must be the average speed of the person is he is to catch the ball at the bottom of the building?
(he; to catch; the ball; at the bottom of the building) (What must be the average speed of the person; is; he is to catch the ball at the bottom of the building) Context(What must be the average speed of the person is,List([0, 47))):(he; is; to catch the ball at the bottom of the building)
What must be the average speed of the person is,List([0, 47))
he What must be the average speed of the person he
to catch is is
the ball at the bottom of the building
he is to catch the ball at the bottom of the building
to catch the ball at the bottom of the building