Susan Heitler in her book The Power of Two (1997) says it well: Picture two soccer players with a ball that they are kicking as they run the length of a field.
(they; run; the length of a field) (Susan Heitler in her book; says; ) Context(Susan Heitler in her book says,List([0, 54))):(they; are kicking; T:as they run the length of a field)
Susan Heitler in her book says,List([0, 54))
they Susan Heitler in her book they
run says are kicking
the length of a field
T:as they run the length of a field