Parse this person name:

Beekman van Tours, Merle A. Thom B., 1692-1721
user
first_name: Merle
last_name: Beekman van Tours
middle_names:
- A.
- Thom
- B.
temporal:
- start: 1692
  end: 1721
  type: life_span
titles: []
extra_info: []
assistant