Parse this person name:

Siem Dubois, 1734-1788, flourished 1758-1777
user
first_name: Siem
last_name: Dubois
middle_names: []
temporal:
- start: 1734
  end: 1788
  type: life_span
- start: 1758
  end: 1777
  type: flourished
titles: []
extra_info: []
assistant