For example, the best way to learn why there are phases of the Moon is to see the effect from Earth's perspective in a Sun-Earth-Moon model.
(the best way to learn why there are phases of the Moon; is; to see the effect from Earth's perspective in a Sun-Earth-Moon model)
the best way to learn why there are phases of the Moon
is
to see the effect from Earth's perspective in a Sun-Earth-Moon model