What are the keywords in the following sentence? tractor ploughing a field with sea gulls following
field, gull, plough, tractor

What are the keywords in the following sentence? bee flying around different blossoms collecting pollen on a bright clear day
bee, fly, pollen

What are the keywords in the following sentence? the roof is covered with straw against the blue sky on a clear sunny day .
day, roof, sky

What are the keywords in the following sentence? a city sits on the banks .
bank, city, sit