Parse this person name:

Alyssa Johnston, 1792-1842, flourished 1810-1837
user
first_name: Alyssa
last_name: Johnston
middle_names: []
temporal:
- start: 1792
  end: 1842
  type: life_span
- start: 1810
  end: 1837
  type: flourished
titles: []
extra_info: []
assistant