Input: Identify the most salient words:

lights of traffic at dusk in a city

Output: city
light
traffic

Input: Identify the most salient words:

silhouette on a misty morning at sunrise

Output: morning
silhouette
sunrise

Input: Identify the most salient words:

cut the chain in the middle so you can add a clasp .

Output: add
chain
middle

Input: Identify the most salient words:

site listing category in the sky

Output:
category
site
sky