Parse this person name:

Roberts, Christopher E. I. Jennifer Megan Douglas., Shirleymouth (1793-1859)
user
first_name: Christopher
last_name: Roberts
middle_names:
- E.
- I.
- Jennifer
- Megan
- Douglas
temporal:
- start: 1793
  end: 1859
  type: life_span
titles: []
extra_info:
- Shirleymouth
assistant