CREATE TABLE table_28931 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" TEXT, "Result" TEXT, "Candidates" TEXT)

What was the result for Andrew Gregg?
SELECT "Result" FROM table_28931 WHERE "Incumbent" = 'Andrew Gregg'
SELECT "Result" FROM "table_28931" WHERE "Incumbent" = 'Andrew Gregg'