What are the keywords in the following sentence? scales weighing an orange to an apple
apple, orange, scale

What are the keywords in the following sentence? a group of builders at a construction site a town in the desert
desert, site, town

What are the keywords in the following sentence? A bathroom all in white, toilet, sink, tub and window.
bathroom, sink, toilet, tub

What are the keywords in the following sentence? map from which users can select the district in which they want to browse hospitals .
browse, hospital, map, select, want