Input: Identify the most salient words:

little white flower in grass against a blue sky .

Output: flower
grass
sky

Input: Identify the most salient words:

donkey waiting for tourist in the ancient city of tourist attraction

Output: attraction
city
donkey
tourist
wait

Input: Identify the most salient words:

the actual crew of space mission returned after an explosion in space .

Output: crew
mission
space

Input: Identify the most salient words:

moon rising behind a winter leafless common oak tree on a field dark nordic january evening .

Output:
field
moon
rise