Input: Identify the most salient words:

crowds follow the funeral procession of politician

Output: crowd
follow
procession

Input: Identify the most salient words:

A train engine with steam coming from it on a track.

Output: come
engine
steam
track

Input: Identify the most salient words:

loading of coal in coaches of the train

Output: coal
loading
train

Input: Identify the most salient words:

the colour of trees cause these beautiful abstract reflections in the gently rippling surface of a lake .

Output:
lake
reflection
ripple