Complex sentence: First of all, "tuak" (rice wine) which is the traditional drink of Dayaks is brewed at least one month before the celebration obviously using the glutinous rice from the recent bountiful harvest mixed with home-made yeast for fermentation.
Split into simpler sentences: First of all, "tuak" (rice wine), the traditional drink of Dayaks, is brewed at least one month before the celebration. The drink is brewed using the glutinous rice from the recent bountiful harvest mixed with home-made yeast for fermentation.