Parse this person name:

Marilyn Swanson (1876-1949, flourished 1903-1922)
user
first_name: Marilyn
last_name: Swanson
middle_names: []
temporal:
- start: 1876
  end: 1949
  type: life_span
- start: 1903
  end: 1922
  type: flourished
titles: []
extra_info: []
assistant