CREATE TABLE table_78229 ("Peak" TEXT, "Height  ( m ) " FLOAT, "Prom.  ( m ) " FLOAT, "Class" TEXT, "Parent" TEXT)

Which Class is Peak Sail when it has a Prom larger than 30?
SELECT "Class" FROM table_78229 WHERE "Prom. (m)" > '30' AND "Peak" = 'sail'
SELECT "Class" FROM "table_78229" WHERE "Peak" = 'sail' AND "Prom. (m)" > '30'