Parse this person name:

Heiner Hethur (1856-1909, flourished 1877-1903)
user
first_name: Heiner
last_name: Hethur
middle_names: []
temporal:
- start: 1856
  end: 1909
  type: life_span
- start: 1877
  end: 1903
  type: flourished
titles: []
extra_info: []
assistant