Input: Identify the most salient words:

add an unique touch of color and drama to your garden by adding black flowers and plants .

Output: add
color
flower
plant

Input: Identify the most salient words:

steam rising slowly from cooling towers of a power station

Output: cool
rise
steam

Input: Identify the most salient words:

island in the form of heart and flying plane

Output: fly
form
plane

Input: Identify the most salient words:

portrait of politician from a private collection

Output:
collection
politician
portrait