Parse this person name:

Helena Stroh, 1285-1326, flourished 1304-1321
user
first_name: Helena
last_name: Stroh
middle_names: []
temporal:
- start: 1285
  end: 1326
  type: life_span
- start: 1304
  end: 1321
  type: flourished
titles: []
extra_info: []
assistant