Parse this person name:

Marissa Stevens-Cobb, 1809-1866, flourished 1829-1847
user
first_name: Marissa
last_name: Stevens-Cobb
middle_names: []
temporal:
- start: 1809
  end: 1866
  type: life_span
- start: 1829
  end: 1847
  type: flourished
titles: []
extra_info: []
assistant