Input: Identify the most salient words:

material is unloaded at the north end of the building using an overhead crane when needed .

Output: building
crane
end

Input: Identify the most salient words:

a large jet is parked in a field

Output: field
jet
park

Input: Identify the most salient words:

close up slow motion shot of burning coal from a campfire

Output: burn
close
coal

Input: Identify the most salient words:

image of dressed slate textured wall panels with a chair in the foreground

Output:
chair
image
panel
slate
texture