Parse this person name:

Nikki Kerkhof, 1950-1995, flourished 1973-1990
user
first_name: Nikki
last_name: Kerkhof
middle_names: []
temporal:
- start: 1950
  end: 1995
  type: life_span
- start: 1973
  end: 1990
  type: flourished
titles: []
extra_info: []
assistant