Input: Identify the most salient words:

teenage boy taking a test while his teacher supervises his classmates

Output: take
teacher
test

Input: Identify the most salient words:

invention mounted on a wall

Output: invention
mount
wall

Input: Identify the most salient words:

burning coals in a stove

Output: burn
coal
stove

Input: Identify the most salient words:

and building function and church

Output:
build
church
function