Parse this person name:

Leah Timmermans (1387-1430, flourished 1403-1421)
user
first_name: Leah
last_name: Timmermans
middle_names: []
temporal:
- start: 1387
  end: 1430
  type: life_span
- start: 1403
  end: 1421
  type: flourished
titles: []
extra_info: []
assistant