Parse this person name:

Cesar Sanmartín, 1861-1904, flourished 1883-1899
user
first_name: Cesar
last_name: Sanmartín
middle_names: []
temporal:
- start: 1861
  end: 1904
  type: life_span
- start: 1883
  end: 1899
  type: flourished
titles: []
extra_info: []
assistant