Input: Identify the most salient words:

a classroom full of students learning at a primary school

Output: learn
school
student

Input: Identify the most salient words:

politician holding a brick during his speech to delegates at the annual conference .

Output: conference
delegate
politician
speech

Input: Identify the most salient words:

driving shot of a frozen valley and mountains with trees

Output: drive
mountain
valley

Input: Identify the most salient words:

slow motion video of a honey bee flying around a bed of flower and collecting nectar

Output:
bed
bee
collect
fly
nectar