Parse this person name:

Valentijn Niermann (1715-1774, flourished 1743-1769)
user
first_name: Valentijn
last_name: Niermann
middle_names: []
temporal:
- start: 1715
  end: 1774
  type: life_span
- start: 1743
  end: 1769
  type: flourished
titles: []
extra_info: []
assistant