Parse this person name:

Merle Vertooren (1238-1307, flourished 1257-1278)
user
first_name: Merle
last_name: Vertooren
middle_names: []
temporal:
- start: 1238
  end: 1307
  type: life_span
- start: 1257
  end: 1278
  type: flourished
titles: []
extra_info: []
assistant