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

What are the keywords in the following sentence? progress of construction in the tunnel
construction, progress, tunnel

What are the keywords in the following sentence? soldiers salute as their national anthem is played during a military parade to celebrate on saturday .
anthem, salute, soldier

What are the keywords in the following sentence? A heard of elephants with one's trunk raised.
elephant, raise, trunk