Parse this person name:

Lena Heerkens, 1830-1903, flourished 1858-1868
user
first_name: Lena
last_name: Heerkens
middle_names: []
temporal:
- start: 1830
  end: 1903
  type: life_span
- start: 1858
  end: 1868
  type: flourished
titles: []
extra_info: []
assistant