Parse this person name:

Janna van Herstal (1821-1899, flourished 1851-1863)
user
first_name: Janna
last_name: van Herstal
middle_names: []
temporal:
- start: 1821
  end: 1899
  type: life_span
- start: 1851
  end: 1863
  type: flourished
titles: []
extra_info: []
assistant