How do you say When connecting two nouns using の which noun is the main idea in the sentence? in Japanese?

The second noun is the main idea i.e. what the sentence is about, with the first noun providing specific information relating to the main idea. For example in さくら　だいがく　の　がくせい　the second noun is the main idea because we are talking about a student and the first noun provides some specific information about that student, namely that this student goes to Sakura University.