Input: Identify the most salient words:

the main entrance to the prayer hall of moorish structure decorated with many antique columns

Output: column
decorate
hall
structure

Input: Identify the most salient words:

empty road with a shadow in the shape of arrow

Output: arrow
road
shadow

Input: Identify the most salient words:

the statue of liberty contains a large amount of copper

Output: copper
liberty
statue

Input: Identify the most salient words:

time lapse of rotating hands of the clock .

Output:
clock
hand
rotate