What are the keywords in the following sentence? grapes growing on a vine
grape, grow, vine

What are the keywords in the following sentence? view of local train traveling on rail tracks with flourishing cherry blossoms along the railway
flourish, railway, train, travel, view

What are the keywords in the following sentence? Two wrestlers, one wearing mainly red and the other mainly blue are on a mat in a wrestling position.
mat, position, wrestler

What are the keywords in the following sentence? corn on the cob with a knob of melting butter
butter, cob, corn