Parse this person name:

Mary Arnold (1726-1799, flourished 1742-1762)
user
first_name: Mary
last_name: Arnold
middle_names: []
temporal:
- start: 1726
  end: 1799
  type: life_span
- start: 1742
  end: 1762
  type: flourished
titles: []
extra_info: []
assistant