Input: Identify the most salient words:

the upper floors of the building partially covered in fog .

Output: building
cover
fog

Input: Identify the most salient words:

fog rises behind a forest of trees on a moody day

Output: fog
forest
rise

Input: Identify the most salient words:

model of an artificial satellite in the space

Output: model
satellite
space

Input: Identify the most salient words:

paintings at the station to increase awareness among tourists about conservation .

Output:
conservation
increase
painting
station
tourist