What are the keywords in the following sentence? beautiful wedding couple at reef on a city
city, couple, reef

What are the keywords in the following sentence? add a fruit to your breakfast
add, breakfast, fruit

What are the keywords in the following sentence? naval ship passing in the foggy sea
pass, sea, ship

What are the keywords in the following sentence? traffic was brought to a standstill whilst police closed lane
bring, close, standstill, traffic