What are the keywords in the following sentence? frozen canal on a winters misty morning
canal, freeze, winter

What are the keywords in the following sentence? found this book i bought years ago while unpacking .
book, buy, find

What are the keywords in the following sentence? A farm with a pasture for cattle and a grain silo near buildings.
building, cattle, pasture

What are the keywords in the following sentence? spending a blissful afternoon on the fishing .
afternoon, fishing, spend