What are the keywords in the following sentence? sitting at entrance of a shop
entrance, shop, sit

What are the keywords in the following sentence? fishermen pushing boat into the sea
boat, fisherman, push, sea

What are the keywords in the following sentence? highway through grassy fields on a sunny day
day, field, highway

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