Input: Identify the most salient words:

water rushing over and around boulders creates a vortex like pattern

Output: create
pattern
water

Input: Identify the most salient words:

militants have reportedly destroyed the arch of triumph in the ancient city of dating

Output: city
destroy
militant

Input: Identify the most salient words:

full moon rising over us state and suspension bridge at twilight

Output: bridge
moon
rise

Input: Identify the most salient words:

riot police clashing with public protesters during an unauthorized march

Output:
clash
march
police
protester