What are the keywords in the following sentence? protected site is a ruin located in the small town of a city
city, site, town

What are the keywords in the following sentence? Someone tilts his head and grins.
grin, head, tilt

What are the keywords in the following sentence? organisation generously donates posters to many of the schools we visit
organisation, school, visit

What are the keywords in the following sentence? a dog dressed up for day
day, dog, dress