Table: vacancy_successors_2
Columns: district
vacator
reason_for_change
successor
date_successor_seated

Question: Name the date successor seated for contested election; served until february 14, 1794
SQL: SELECT "date_successor_seated" FROM vacancy_successors_2 WHERE "reason_for_change" = 'Contested election; served until February 14, 1794'

Question: Name the date successor seated for delegate seat established
SQL: SELECT "date_successor_seated" FROM vacancy_successors_2 WHERE "reason_for_change" = 'Delegate seat established'

Question: Name the date successor seated is south carolina 3rd
SQL: SELECT "date_successor_seated" FROM vacancy_successors_2 WHERE "district" = 'South Carolina 3rd'