What are the keywords in the following sentence? The vendor has nothing for sale.
nothing, sale, vendor

What are the keywords in the following sentence? rainbow over the statue of liberty after a stormy day
day, liberty, statue

What are the keywords in the following sentence? international visitors may need a passport for domestic flights
flight, need, passport

What are the keywords in the following sentence? city and beach on rugged central coast .
beach, city, coast