If no continental plate is involved in the convergent margin, then the volcanos occur as a line of ocean islands and sea mounts on one of the ocean plates.
(no continental plate; is involved; in the convergent margin) (the volcanos; occur; as a line of ocean islands and sea mounts on one of the ocean plates; T:then)
no continental plate the volcanos
is involved occur
in the convergent margin
as a line of ocean islands and sea mounts on one of the ocean plates T:then