What are the keywords in the following sentence? the next day a second cliff fell causing a huge cloud of chalk to appear
cliff, cloud, fall

What are the keywords in the following sentence? the ferry operated by transportation business in livery entering the port
business, enter, operate, port

What are the keywords in the following sentence? an original knot in the form of a heart and interlocking hearts
form, heart, knot

What are the keywords in the following sentence? the ancient city is just one of the many cool things to discover on a visit .
city, thing, visit