Task: Question Answering
Input (English): Context: Della and I spent a great deal of our youth in the woods . Weekends " in the country " which equals at family property in Kent . Also Summers in Haines Alaska for a decade . The smell of earth and ferns and damp is the same . 
Question: Why does the narrator get nostalgic by ferns ?
Output (English): It reminds them of their youth .