Parse this person name:

Marvin Saunders, 1786-1835, flourished 1815-1830
user
first_name: Marvin
last_name: Saunders
middle_names: []
temporal:
- start: 1786
  end: 1835
  type: life_span
- start: 1815
  end: 1830
  type: flourished
titles: []
extra_info: []
assistant