For example, if the target is a mountain, many students have been observed moving their hands in front of their faces tracing out the outlines of the steeply sloped mountain, even to the point of outlining the rounded or pointed peak of the mountain.
(the target; is; a mountain) (many students; have been observed; ) (many students; moving; their hands; in front of their faces)
the target many students many students
is have been observed moving
a mountain
their hands in front of their faces