CREATE TABLE table_39429 ("Category" TEXT, "Type" TEXT, "Attribute" TEXT, "Bubbles" TEXT, "Cancelable" TEXT)

Name the cancelable for onmouseover
SELECT "Cancelable" FROM table_39429 WHERE "Attribute" = 'onmouseover'
SELECT "Cancelable" FROM "table_39429" WHERE "Attribute" = 'onmouseover'