What are the keywords in the following sentence? An old middle eastern man is selling corn-on-the-cob from his brother's cart.
cart, cob, corn, sell

What are the keywords in the following sentence? an animation of a rotating light source emitting purple light particles to and from the light source in space
animation, emit, particle

What are the keywords in the following sentence? patterns in the sky formed by high altitude overflying aircraft
aircraft, pattern, sky

What are the keywords in the following sentence? purple flowers floating in a carved stone bowl .
bowl, carve, flower