Parse this person name:

Jeffrey Walker (1841-1883, flourished 1859-1875)
user
first_name: Jeffrey
last_name: Walker
middle_names: []
temporal:
- start: 1841
  end: 1883
  type: life_span
- start: 1859
  end: 1875
  type: flourished
titles: []
extra_info: []
assistant