CREATE TABLE table_77220 ("Rank" TEXT, "Name" TEXT, "Location" TEXT, "Length  (  m  ) " TEXT, "Length  (  ft  ) " TEXT)

What is the length in feet of the Jiangzhou arch?
SELECT "Length ( ft )" FROM table_77220 WHERE "Name" = 'jiangzhou arch'
SELECT "Length ( ft )" FROM "table_77220" WHERE "Name" = 'jiangzhou arch'