What are the keywords in the following sentence? wet seaweed on a rock on the sea shore
rock, seaweed, shore

What are the keywords in the following sentence? ship passing a city after leaving country
country, leave, ship

What are the keywords in the following sentence? sunrise over sea seen from a boat
boat, sea, sunrise

What are the keywords in the following sentence? a couple of men that are eating some cake
cake, couple, eat