What are the keywords in the following sentence? a steam train arrives at station on the railway
railway, station, train

What are the keywords in the following sentence? An empty plate that has congratulations written on it with chocolate.
chocolate, plate, write

What are the keywords in the following sentence? the grass and cane waves a wind on lake
grass, lake, wave

What are the keywords in the following sentence? A skier travels downhill through the snow under a cloudy sky.
sky, snow, travel