Æthelflæd
Further reading
Table:
Titles of nobility

Preceded by

Æthelred II
Lord of the Mercians

Lady of the Mercians
911–918

Succeeded by

Ælfwynn

Looking at the table that covers 'Æthelflæd' (see 'Further reading'), create one factual sentence about the highlighted cells, without adding extra data and format it within the following JSON object {"answer": "YOUR ANSWER"}.