The Pavlov's experiment with a dog, which learned to slaver when he heard the bell waiting for the mess, is often used as an evidence.
(a dog; learned; to slaver; T:when he heard the bell waiting for the mess) (The Pavlov's experiment with a dog; is used; as an evidence; T:often) (he; heard; the bell waiting for the mess) Context(he heard,List([65, 73))):(the bell; waiting; for the mess)
he heard,List([65, 73))
a dog The Pavlov's experiment with a dog he the bell
learned is used heard waiting
to slaver T:when he heard the bell waiting for the mess
as an evidence T:often
the bell waiting for the mess
for the mess