Parse this person name:

Ravi Knoers (1918-1990, flourished 1940-1959)
user
first_name: Ravi
last_name: Knoers
middle_names: []
temporal:
- start: 1918
  end: 1990
  type: life_span
- start: 1940
  end: 1959
  type: flourished
titles: []
extra_info: []
assistant