These two gave birth to an era of long oceanic voyages and discoveries as well as inventions that allowed them, in the first place.
(These two; gave; birth; to an era of long oceanic voyages and discoveries as well as inventions) (inventions; allowed; them; L:in the first place)
These two inventions
gave allowed
birth to an era of long oceanic voyages and discoveries as well as inventions
them L:in the first place