Parse this person name:

Jeffrey Marshall (1815-1869, flourished 1835-1857)
user
first_name: Jeffrey
last_name: Marshall
middle_names: []
temporal:
- start: 1815
  end: 1869
  type: life_span
- start: 1835
  end: 1857
  type: flourished
titles: []
extra_info: []
assistant