What are the keywords in the following sentence? firefighters battle a fire on person on wednesday .
battle, fire, firefighter, wednesday

What are the keywords in the following sentence? northern lights over the road in tundra
light, road, tundra

What are the keywords in the following sentence? time lapse of clouds moving through the sky with leafless trees in the foreground
cloud, foreground, sky, tree

What are the keywords in the following sentence? a large and detailed map of the state with all counties and main cities .
county, map, state