CREATE TABLE table_51801 ("Date" TEXT, "Visitor" TEXT, "Score" TEXT, "Home" TEXT, "Decision" TEXT, "Attendance" FLOAT, "Series" TEXT)

What is the combined crowd in Vancouver on may 22?
SELECT SUM("Attendance") FROM table_51801 WHERE "Home" = 'vancouver' AND "Date" = 'may 22'
SELECT SUM("Attendance") FROM "table_51801" WHERE "Date" = 'may 22' AND "Home" = 'vancouver'