Parse this person name:

Dex le Gallen, 1737-1810, flourished 1755-1768
user
first_name: Dex
last_name: le Gallen
middle_names: []
temporal:
- start: 1737
  end: 1810
  type: life_span
- start: 1755
  end: 1768
  type: flourished
titles: []
extra_info: []
assistant