Input: Identify the most salient words:

an airplane stands on the tarmac in the airport .

Output: airplane
airport
stand
tarmac

Input: Identify the most salient words:

georgian structure was built and became the hq for government

Output: build
government
structure

Input: Identify the most salient words:

this is what the site listing category could look like with some hard work .

Output: category
list
look

Input: Identify the most salient words:

shot of field with a shadow of helicopter

Output:
field
shadow
shot