There is no electricity, and the only communication with the outside world is via a shortwave radio run by a car battery that in turn is charged up with a gas generator.
(the only communication with the outside world; is; via a shortwave radio) (a shortwave radio; run; by a car battery) (a car battery; is charged up; with a gas generator)
the only communication with the outside world a shortwave radio a car battery
is run is charged up
via a shortwave radio
by a car battery
with a gas generator