Parse this person name:

Valentina Niggli (1943-2012, flourished 1969-1998)
user
first_name: Valentina
last_name: Niggli
middle_names: []
temporal:
- start: 1943
  end: 2012
  type: life_span
- start: 1969
  end: 1998
  type: flourished
titles: []
extra_info: []
assistant