Parse this person name:

Calisto Isern (1721-1779, flourished 1738-1752)
user
first_name: Calisto
last_name: Isern
middle_names: []
temporal:
- start: 1721
  end: 1779
  type: life_span
- start: 1738
  end: 1752
  type: flourished
titles: []
extra_info: []
assistant