Task: Question Understanding
Input (English): Context : Neltje Blanchan De Graff Doubleday (October 23, 1865 -- February 21, 1918) was a United States scientific historian and nature writer who published several books on wildflowers and birds under the pen name Neltje Blanchan. 
Question : What was Neltje Blanchan's occupation?
Output (English): occupation