Parse this person name:

Sergius Milanesi, 1203-1280, flourished 1231-1244
user
first_name: Sergius
last_name: Milanesi
middle_names: []
temporal:
- start: 1203
  end: 1280
  type: life_span
- start: 1231
  end: 1244
  type: flourished
titles: []
extra_info: []
assistant