(Thirteen is the number of days the moon waxes to full, and the number of days it wanes to new.
(Thirteen; is; the number of days the moon waxes to full, and) (the number of days; waxes; to full) (the number of days; wanes; to new)
Thirteen the number of days the number of days
is waxes wanes
the number of days the moon waxes to full, and
to full
to new