CREATE TABLE table_46634 ("Nominative" TEXT, "Ergative" TEXT, "Dative" TEXT, "Genitive" TEXT, "Instrumental" TEXT, "Adverbial" TEXT)

What is the ergative for the dative (i)mas?
SELECT "Ergative" FROM table_46634 WHERE "Dative" = '(i)mas'
SELECT "Ergative" FROM "table_46634" WHERE "Dative" = '(i)mas'