Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Father | Birth | Marriage | Became Countess | Ceased to be Countess | Death | Spouse |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Beatrice of Brabant | Henry II, Duke of Brabant ( Leuven ) | 1225 | November 1247 | November 1247 | 6 June 1251 husband's death | 11 November 1288 | William II |
| Matilda of Bethune | Robert VII, Lord of Bethune ( Bethune ) | after 1230 | 2 February 1246 | 6 June 1251 husband's accession | 8 November 1264 | 8 November 1264 | Guy |
| Isabelle, Marchioness of Namur | Henry V, Count of Luxembourg ( Luxembourg ) | 1247 | March or May 1264 | March or May 1264 | 25 September 1298 | 25 September 1298 | Guy |
| Margaret I, Countess of Burgundy | Philip V of France ( Capet ) | 1309 | 22 July 1320 | 17 September 1322 husband's accession | 26 August 1346 husband's death | 9 May 1382 | Louis I |
| Margaret of Brabant | Henry II, Duke of Brabant ( Leuven ) | 9 February 1323 | 6 June 1347 | 6 June 1347 | 1368 | 1368 | Louis II |
Question:
What is the date of death of the Countess of Flanders who was born in 1309?
Answer:
9 May 1382