Parse this person name:

Ralf Gnatz, 1858-1913, flourished 1875-1902
user
first_name: Ralf
last_name: Gnatz
middle_names: []
temporal:
- start: 1858
  end: 1913
  type: life_span
- start: 1875
  end: 1902
  type: flourished
titles: []
extra_info: []
assistant