The smugglers, however, carry a mirror on top of a 3 metre pole: by placing the mirror in the beam they can reflect the light down to their eyes and read signals.
(they; read; signals) (they; can reflect down; the light) Context(they can reflect down,List([99, 130))):(The smugglers; carry; a mirror; on top of a 3 metre pole)
they can reflect down,List([99, 130))
they they The smugglers
read can reflect down carry
signals
the light
a mirror on top of a 3 metre pole