Parse this person name:

Robert Bridget Samantha Mcintosh, Rachelburgh, 1827-1878
user
first_name: Robert
last_name: Mcintosh
middle_names:
- Bridget
- Samantha
temporal:
- start: 1827
  end: 1878
  type: life_span
titles: []
extra_info:
- Rachelburgh
assistant