Parse this person name:

Jack Duffy, 1819-1864, flourished 1837-1859
user
first_name: Jack
last_name: Duffy
middle_names: []
temporal:
- start: 1819
  end: 1864
  type: life_span
- start: 1837
  end: 1859
  type: flourished
titles: []
extra_info: []
assistant