What are the keywords in the following sentence? celebrity walks the runway to applause after showing his latest collection during fashion week
celebrity, walk, week

What are the keywords in the following sentence? empty highway disappearing into the trees in the forest
disappear, forest, tree

What are the keywords in the following sentence? A small pizza sits on a cooling rack.
cool, pizza, rack, sit

What are the keywords in the following sentence? the city of biggest christmas tree yet is lowered into place on monday morning .
city, place, tree