Parse this person name:

Elizabeth de Grunt, 1297-1364, flourished 1315-1337
user
first_name: Elizabeth
last_name: de Grunt
middle_names: []
temporal:
- start: 1297
  end: 1364
  type: life_span
- start: 1315
  end: 1337
  type: flourished
titles: []
extra_info: []
assistant