Parse this person name:

Merijn Uphuis, 1378-1450, flourished 1397-1409
user
first_name: Merijn
last_name: Uphuis
middle_names: []
temporal:
- start: 1378
  end: 1450
  type: life_span
- start: 1397
  end: 1409
  type: flourished
titles: []
extra_info: []
assistant