Input: Identify the most salient words:

punching hand with a clenched fist aimed directly at the viewer isolated on grey

Output: aim
fist
hand
isolate
viewer

Input: Identify the most salient words:

looking down from upper level of the shopping centre decorated for western christian holiday in city

Output: centre
holiday
look

Input: Identify the most salient words:

people try computers carrying operating system software the new operating system at an electric shop

Output: operate
software
system

Input: Identify the most salient words:

firefighters battle heavy smoke and fire at an apartment building under construction in may .

Output:
building
construction
fire
firefighter