Parse this person name:

Sander Blaak (1740-1804, flourished 1765-1790)
user
first_name: Sander
last_name: Blaak
middle_names: []
temporal:
- start: 1740
  end: 1804
  type: life_span
- start: 1765
  end: 1790
  type: flourished
titles: []
extra_info: []
assistant