Question: Who is Mary, Crown Princess of Denmark's mother-in-law?
Sentence (from "Mary, Crown Princess of Denmark"): Mary, Crown Princess of Denmark, Countess of Monpezat, {'1': ", '2': ", '3': 'R.E.', '4': "} (Mary Elizabeth; "née" Donaldson; born 5 February 1972) is the wife of Frederik, Crown Prince of Denmark.
Relevant evidence: Yes