Parse this person name:

Witold Weihmann, 1237-1277, flourished 1256-1272
user
first_name: Witold
last_name: Weihmann
middle_names: []
temporal:
- start: 1237
  end: 1277
  type: life_span
- start: 1256
  end: 1272
  type: flourished
titles: []
extra_info: []
assistant