Darkness is almost inexistent in the arctic at this time (north of the polar circle) although the sun still rises and sets every day.
(Darkness; is; almost inexistent in the arctic; T:at this time) (the sun; rises; T:still) (the sun; sets; T:every day)
Darkness the sun the sun
is rises sets
almost inexistent in the arctic T:at this time
T:still
T:every day