Parse this person name:

Leonard Koch (1841-1888, flourished 1859-1874)
user
first_name: Leonard
last_name: Koch
middle_names: []
temporal:
- start: 1841
  end: 1888
  type: life_span
- start: 1859
  end: 1874
  type: flourished
titles: []
extra_info: []
assistant