Task: Question Understanding
Input (English): Context : Nils Dardel (full name Nils Elias Kristofer von Dardel, sometimes known as Nils de Dardel) was a 20th-century Swedish Post-Impressionist painter, grandson to famous Swedish painter Fritz von Dardel. 
Question : What is Nils Dardel's spouse's name?
Output (English): spouse