Parse this person name:

Gianmarco Roero-Sanudo, 1804-1877, flourished 1820-1844
user
first_name: Gianmarco
last_name: Roero-Sanudo
middle_names: []
temporal:
- start: 1804
  end: 1877
  type: life_span
- start: 1820
  end: 1844
  type: flourished
titles: []
extra_info: []
assistant