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The shadow of the unknown on the door behind the man
Puppies I wonder what breed unknown
An astronaut on an unknown planet Prometheus
An unknown monster attacked people in the fog
Aerial combat of unknown aircraft
And the ship sailed to unknown shores
The landscape of an unknown lake where only trees are visible
Sprouts of an unknown plant in the ground
Clouds and a storm on the canyon frighten the unknown
Orange sunset in the unknown
Crossing by water to an unknown distance
Color abstract painting by an unknown author