Parse this person name:

Heather Christensen (1304-1377, flourished 1328-1339)
user
first_name: Heather
last_name: Christensen
middle_names: []
temporal:
- start: 1304
  end: 1377
  type: life_span
- start: 1328
  end: 1339
  type: flourished
titles: []
extra_info: []
assistant