Input: Identify the most salient words:

site of digging the foundation for a building

Output: building
foundation
site

Input: Identify the most salient words:

scientist taking notes on his experiment in the laboratory

Output: experiment
laboratory
scientist

Input: Identify the most salient words:

government agency blocking a road at the protests

Output: agency
block
road

Input: Identify the most salient words:

taken from my room as a ship came under the lift bridge .

Output:
come
ship
take