Problem: What are the most important words?
group of tourist visiting old ruins on a hill
Answer: ruin, tourist, visit

Problem: What are the most important words?
A man narrates a video of football plays demonstrating a tackle called the smoother tackle.
Answer: demonstrate, football, tackle

Problem: What are the most important words?
skateboarder grinding down the retaining wall of a park
Answer:
grind, park, skateboarder