CREATE TABLE table_6935 ("Name" TEXT, "Stories" FLOAT, "Height" TEXT, "Built" TEXT, "Purpose" TEXT, "Status" TEXT)

What is the year built of the home with a built status and a 42 m. height?
SELECT "Built" FROM table_6935 WHERE "Status" = 'built' AND "Height" = '42 m.'
SELECT "Built" FROM "table_6935" WHERE "Height" = '42 m.' AND "Status" = 'built'