Question: What is the date of death of George Washington Custis Lee's mother?
Sentence (from "Mary Anna Custis Lee"): Mary Anna Randolph Custis Lee (October 1, 1807 – November 5, 1873) was the great-granddaughter of Martha Custis Washington and wife of Robert E. Lee, the prominent career military officer who commanded the Confederate Army of Northern Virginia during the American Civil War.
Relevant evidence: Yes