Parse this person name:

Steffen Eigenwillig (1710-1752, flourished 1734-1747)
user
first_name: Steffen
last_name: Eigenwillig
middle_names: []
temporal:
- start: 1710
  end: 1752
  type: life_span
- start: 1734
  end: 1747
  type: flourished
titles: []
extra_info: []
assistant