What are the keywords in the following sentence? antiques and carpets for sale in shops in the old historic bazaar of the city
antique, bazaar, city, sale, shop

What are the keywords in the following sentence? frog in the water on pond
frog, pond, water

What are the keywords in the following sentence? a horse looks over its shoulder at a passerby
horse, look, shoulder

What are the keywords in the following sentence? A herd of zebra standing and grazing in a green field.
field, grazing, standing