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@arr = (
  {person => 'PersonA', place => 'PlaceA',}
  {person => 'PersonB', place => 'PlaceB',}
);

CREATE TABLE tbl (
  person, org
)

@arr = (
  {
...
    works_for => 'PersonA', 
  }
);

@arr = (
  {
...
    has_assistant => '',
  }
);

CREATE TABLE tbl (
  person, org, works_for, has_assistant
)