Input: Identify the most salient words:

celebrate holiday with the arrival of ship

Output: celebrate
holiday
ship

Input: Identify the most salient words:

building official residence of the president

Output: build
president
residence

Input: Identify the most salient words:

stairs made of books on a concept of learning and achievement of success .

Output: book
stair
success

Input: Identify the most salient words:

teacher talking with her pupils in the classroom

Output:
classroom
pupil
talk
teacher