CREATE TABLE table_name_81 (age_at_time_of_disaster VARCHAR2, date_of_birth VARCHAR2)

How old was the person born 24 September 1851 at the time of disaster?
SELECT age_at_time_of_disaster FROM table_name_81 WHERE date_of_birth = "24 september 1851"
SELECT "age_at_time_of_disaster" FROM "table_name_81" WHERE "24 september 1851" = "date_of_birth"