Parse this person name:

Megan Johnson, 1400-1463, flourished 1419-1438
user
first_name: Megan
last_name: Johnson
middle_names: []
temporal:
- start: 1400
  end: 1463
  type: life_span
- start: 1419
  end: 1438
  type: flourished
titles: []
extra_info: []
assistant