What are the keywords in the following sentence? shadows moving across the town at sunrise in winter
move, sunrise, winter

What are the keywords in the following sentence? a bomber flown by a crew based .
bomber, crew, fly

What are the keywords in the following sentence? Very large building with a giant clock at the highest point.
building, clock, point

What are the keywords in the following sentence? the average number of thunderstorm days per year .
day, number, year