Parse this person name:

Stephen Mejia (1511-1553, flourished 1539-1548)
user
first_name: Stephen
last_name: Mejia
middle_names: []
temporal:
- start: 1511
  end: 1553
  type: life_span
- start: 1539
  end: 1548
  type: flourished
titles: []
extra_info: []
assistant