Question: Who is the mother-in-law of Fortune Fitzroy, Duchess Of Grafton?
Sentence (from "Marian Shields Robinson"): Marian Lois Robinson( née Shields; born July 29, 1937) is the mother of Michelle Obama, former First Lady of the United States, and Craig Robinson, a basketball executive, and the mother- in- law of former U.S. President Barack Obama.
Relevant evidence: No