Parse this person name:

Keith Crawford (1749-1812, flourished 1774-1787)
user
first_name: Keith
last_name: Crawford
middle_names: []
temporal:
- start: 1749
  end: 1812
  type: life_span
- start: 1774
  end: 1787
  type: flourished
titles: []
extra_info: []
assistant