Parse this person name:

Oskar Schleich (1849-1890, flourished 1865-1879)
user
first_name: Oskar
last_name: Schleich
middle_names: []
temporal:
- start: 1849
  end: 1890
  type: life_span
- start: 1865
  end: 1879
  type: flourished
titles: []
extra_info: []
assistant