Removes terminal alpha-N-acetylgalactosamine residues from glycolipids and glycopeptides. Required for the breakdown of glycolipids. Cleavage of non-reducing alpha-(1->3)-N-acetylgalactosamine residues from human blood group A and AB mucin glycoproteins, Forssman hapten and blood group A lacto series glycolipids. a neolactoside IV(3)-alpha-GalNAc,IV(2)-alpha-Fuc-nLc4Cer(d18:1(4E)) + H2O = a neolactoside IV(2)-alpha-Fuc-nLc4Cer(d18:1(4E)) + N-acetyl-alpha-D-galactosamine a neolactoside IV(3)-alpha-GalNAc,IV(2)-alpha-Fuc-nLc4Cer(d18:0) + H2O = a neolactoside IV(2)-alpha-Fuc-nLc4Cer(d18:0) + N-acetyl-alpha-D-galactosamine globoside IV3GalNAc-Gb4Cer + H2O = globoside Gb4Cer + N-acetyl-alpha-D-galactosamine Homodimer. Placenta. Glycosylated. Belongs to the glycosyl hydrolase 27 family.