What are the keywords in the following sentence? the illumination from the bright light silhouettes a helicopter during thick fog
fog, helicopter, illumination, light, silhouette

What are the keywords in the following sentence? a big crowd fill the ground during day
crowd, day, ground

What are the keywords in the following sentence? a table and chairs in the shade of a vine covered pergola
chair, cover, pergola, shade, table

What are the keywords in the following sentence? driving on the motorway in the evening rush hour traffic
drive, motorway, traffic