And now, thanks to Albert Einstein and other scientists, we know that matter and energy are interchangeable.
(we; know; that matter and energy are interchangeable; T:now) Context(we know,List([57, 64))):(matter and energy; are; interchangeable)
we know,List([57, 64))
we matter and energy
know are
that matter and energy are interchangeable T:now
interchangeable