What are the keywords in the following sentence? this new image reveals a cloud of hydrogen called gum .
call, cloud, hydrogen

What are the keywords in the following sentence? artificial waterfall which is falling down from huge rock in an amusement park at summer sunny day .
park, summer, waterfall

What are the keywords in the following sentence? students smiling in a campus
campus, smile, student

What are the keywords in the following sentence? books in festive colors are a simple way to add elegant holiday decor to your home .
book, color, way