Parse this person name:

Ben Boeser, 1378-1427, flourished 1403-1421
user
first_name: Ben
last_name: Boeser
middle_names: []
temporal:
- start: 1378
  end: 1427
  type: life_span
- start: 1403
  end: 1421
  type: flourished
titles: []
extra_info: []
assistant