Parse this person name:

Billung-Heerschop, Liz M. (Liz Mara), 1417-1457
user
first_name: Liz
last_name: Billung-Heerschop
middle_names:
- Mara
temporal:
- start: 1417
  end: 1457
  type: life_span
titles: []
extra_info: []
assistant