Parse this person name:

Miroslaw Gierschner, 1248-1296, flourished 1273-1289
user
first_name: Miroslaw
last_name: Gierschner
middle_names: []
temporal:
- start: 1248
  end: 1296
  type: life_span
- start: 1273
  end: 1289
  type: flourished
titles: []
extra_info: []
assistant