Input: Identify the most salient words:

time lapse of clouds around the summit

Output: cloud
lapse
summit

Input: Identify the most salient words:

cosmic seamless pattern with planets of the solar system .

Output: pattern
planet
system

Input: Identify the most salient words:

aerial shot of a lake with small islands

Output: island
lake
shot

Input: Identify the most salient words:

a student works with the help of his teacher at a computer

Output:
help
student
teacher
work