What are the keywords in the following sentence? silhouette of electricity pylons on the wheat field from beautiful sunset till nightly starry sky .
field, pylon, silhouette, sunset

What are the keywords in the following sentence? pharmacist checking a box of medicine in pharmacy
box, medicine, pharmacist, pharmacy

What are the keywords in the following sentence? the mouse with her cheese in the trap .
cheese, mouse, trap

What are the keywords in the following sentence? aircraft model remotely piloted aircraft in flight .
aircraft, flight, model