What are the keywords in the following sentence? fishermen on a boat in the fog
boat, fisherman, fog

What are the keywords in the following sentence? a group of female students celebrating at a graduation ceremony
celebrate, ceremony, student

What are the keywords in the following sentence? oak trees rising above corn field
field, rise, tree

What are the keywords in the following sentence? small light purple flowers grow around a rock wall in a garden
garden, grow, wall