Parse this person name:

Justin Mann (1220-1274, flourished 1237-1249)
user
first_name: Justin
last_name: Mann
middle_names: []
temporal:
- start: 1220
  end: 1274
  type: life_span
- start: 1237
  end: 1249
  type: flourished
titles: []
extra_info: []
assistant