Problem: What are the most important words?
The direction of the scrolling letters change from bottom to top and now they're in the middle.
Answer: bottom, direction, middle, scroll, top

Problem: What are the most important words?
Two large elephants and two calves in a field.
Answer: calf, elephant, field

Problem: What are the most important words?
supporters hold a poster of politician during a political rally
Answer:
hold, politician, poster, rally, supporter