CREATE TABLE table_77104 ("Rank" FLOAT, "Name" TEXT, "Stories" FLOAT, "Height" TEXT, "Year Completed" TEXT, "Primary Purpose" TEXT, "City" TEXT)

What is the height of the EMC Insurance Building in Des Moines?
SELECT "Height" FROM table_77104 WHERE "City" = 'des moines' AND "Name" = 'emc insurance building'
SELECT "Height" FROM "table_77104" WHERE "City" = 'des moines' AND "Name" = 'emc insurance building'