Parse this person name:

Bas Lemmens, 1805-1851, flourished 1820-1830
user
first_name: Bas
last_name: Lemmens
middle_names: []
temporal:
- start: 1805
  end: 1851
  type: life_span
- start: 1820
  end: 1830
  type: flourished
titles: []
extra_info: []
assistant