What are the keywords in the following sentence? film director and actor attend premiere held during festival .
director, festival, hold, premiere

What are the keywords in the following sentence? a teddy bear with a hat placed on his head
hat, head, place

What are the keywords in the following sentence? small boat being towed on the blue tropical sea
boat, sea, tow

What are the keywords in the following sentence? sunny day from a ship at sea with chemical compound and the horizon
day, horizon, ship