Parse this person name:

Piergiorgio Oscuro (1794-1870, flourished 1817-1839)
user
first_name: Piergiorgio
last_name: Oscuro
middle_names: []
temporal:
- start: 1794
  end: 1870
  type: life_span
- start: 1817
  end: 1839
  type: flourished
titles: []
extra_info: []
assistant