What are the keywords in the following sentence? a flock of sheep in the pasture
flock, pasture, sheep

What are the keywords in the following sentence? a hot dip galvanised integral corrugated steel pipe on the ground .
corrugate, ground, pipe

What are the keywords in the following sentence? A guy pulling his luggage toward an airport.
airport, luggage, pull

What are the keywords in the following sentence? young woman hiding face under a book
book, face, hide