Parse this person name:

Mathijs Koster, 1703-1778, flourished 1719-1749
user
first_name: Mathijs
last_name: Koster
middle_names: []
temporal:
- start: 1703
  end: 1778
  type: life_span
- start: 1719
  end: 1749
  type: flourished
titles: []
extra_info: []
assistant