Parse this person name:

Fenna Otto, 1211-1252, flourished 1239-1247
user
first_name: Fenna
last_name: Otto
middle_names: []
temporal:
- start: 1211
  end: 1252
  type: life_span
- start: 1239
  end: 1247
  type: flourished
titles: []
extra_info: []
assistant