Input: Identify the most salient words:

Two giraffes are looking out into the blue sky.

Output: giraffe
look
sky

Input: Identify the most salient words:

time lapse of the dark clouds moving in the sky

Output: cloud
lapse
move
sky

Input: Identify the most salient words:

Two people are spending good time in their boat.

Output: boat
spend
time

Input: Identify the most salient words:

building function for students with big terrace in the very heart

Output:
building
function
heart