Input: Identify the most salient words:

images are projected onto building as part of an endangered species projection .

Output: building
image
project

Input: Identify the most salient words:

politician delivers a speech to his supporters from a balcony at presidential palace .

Output: balcony
politician
supporter

Input: Identify the most salient words:

sun rays streaming behind clouds over the sea

Output: cloud
ray
sea
stream

Input: Identify the most salient words:

astronaut works on the space station during an extravehicular activity

Output:
astronaut
station
work