Problem: What are the most important words?
a view of a city across a river in winter
Answer: city, river, view, winter

Problem: What are the most important words?
football player in action during session before the matches against country do interest .
Answer: action, country, player, session

Problem: What are the most important words?
stag with fur and antlers covered in mud during the rut in autumn
Answer:
antler, autumn, mud, rut, stag