Parse this person name:

Justin Pratt (1809-1881, flourished 1835-1854)
user
first_name: Justin
last_name: Pratt
middle_names: []
temporal:
- start: 1809
  end: 1881
  type: life_span
- start: 1835
  end: 1854
  type: flourished
titles: []
extra_info: []
assistant