What are the keywords in the following sentence? a letter is posted into a bright red post box
box, letter, post

What are the keywords in the following sentence? full moon rising over the trees of a tropical island
island, rise, tree

What are the keywords in the following sentence? a narrow road leads into a village
lead, road, village

What are the keywords in the following sentence? a video showing clouds over palm trees on beach .
beach, cloud, tree