This is the 2094th most frequent Turkish word.
öğrenilen
"Learned" or "that which is learned."
In this sentence, 'öğrenilen' is used as a past participle to describe 'bilgiler' (information); it means 'information that was learned'.
Öğrenilen bilgiler zamanla unutulabilir.
Learned information can be forgotten over time.
Here, 'öğrenilen' qualifies 'konular' (topics), indicating they were learned in the classroom setting.
Sınıfta öğrenilen konular çok ilginçti.
The topics learned in the class were very interesting.
In this example, 'öğrenilen' is used to describe 'haberler' (news), meaning 'the news that was learned yesterday evening'.