Parse this person name:

Helene Tschentscher (1205-1274, flourished 1221-1237)
user
first_name: Helene
last_name: Tschentscher
middle_names: []
temporal:
- start: 1205
  end: 1274
  type: life_span
- start: 1221
  end: 1237
  type: flourished
titles: []
extra_info: []
assistant