There are microorganisms with the capability of making an enzyme, a catalyst, that can take the abundant nitrogen from the air and convert to a form that the plant can use.
(a catalyst; can take; the abundant nitrogen; from the air) (a catalyst; convert; to a form) (a form; can use; the plant)
a catalyst a catalyst a form
can take convert can use
the abundant nitrogen from the air
to a form
the plant