What are the keywords in the following sentence? close up red maple leaf on the tree against sky in autumn .
leaf, sky, tree

What are the keywords in the following sentence? you can grow your portable garden in your living room on a rotating base
base, garden, grow

What are the keywords in the following sentence? a colour image of a small fishing boat returning to the harbour having just passed under the pedestrian bridge
boat, harbour, pass

What are the keywords in the following sentence? sky and water blend into a haze of blue over sea .
blend, sky, water