Parse this person name:

Mary Downs (1733-1803, flourished 1756-1777)
user
first_name: Mary
last_name: Downs
middle_names: []
temporal:
- start: 1733
  end: 1803
  type: life_span
- start: 1756
  end: 1777
  type: flourished
titles: []
extra_info: []
assistant