What are the keywords in the following sentence? place the laptop upside down on a flat surface so that the bottom is facing up .
laptop, place, surface

What are the keywords in the following sentence? perennial flowers add color to the garden in a way that few other plants can .
add, color, flower, garden

What are the keywords in the following sentence? A family is having fun at an amusement park.
family, fun, park

What are the keywords in the following sentence? a man surfs the internet in a dark room
internet, room, surfs