Parse this person name:

Twan Postma (1620-1660, flourished 1639-1655)
user
first_name: Twan
last_name: Postma
middle_names: []
temporal:
- start: 1620
  end: 1660
  type: life_span
- start: 1639
  end: 1655
  type: flourished
titles: []
extra_info: []
assistant