Parse this person name:

Ernest Bien (1337-1394, flourished 1359-1373)
user
first_name: Ernest
last_name: Bien
middle_names: []
temporal:
- start: 1337
  end: 1394
  type: life_span
- start: 1359
  end: 1373
  type: flourished
titles: []
extra_info: []
assistant