Parse this person name:

Gotthard Stiffel, 1336-1405, flourished 1351-1368
user
first_name: Gotthard
last_name: Stiffel
middle_names: []
temporal:
- start: 1336
  end: 1405
  type: life_span
- start: 1351
  end: 1368
  type: flourished
titles: []
extra_info: []
assistant