Parse this person name:

Randolf Lehmann, 1813-1890, flourished 1842-1872
user
first_name: Randolf
last_name: Lehmann
middle_names: []
temporal:
- start: 1813
  end: 1890
  type: life_span
- start: 1842
  end: 1872
  type: flourished
titles: []
extra_info: []
assistant