Parse this person name:

Sergei Eimer, 1343-1391, flourished 1366-1386
user
first_name: Sergei
last_name: Eimer
middle_names: []
temporal:
- start: 1343
  end: 1391
  type: life_span
- start: 1366
  end: 1386
  type: flourished
titles: []
extra_info: []
assistant