Parse this person name:

Dunn, Ashley R. Angela Mathew., East Sarah (1366-1408)
user
first_name: Ashley
last_name: Dunn
middle_names:
- R.
- Angela
- Mathew
temporal:
- start: 1366
  end: 1408
  type: life_span
titles: []
extra_info:
- East Sarah
assistant