Complex sentence: The use of kantha is popular in saris traditionally worn by women in Bengal, but any garment or cloth with kantha embroidery (which forms or outlines decorative motifs with running stitch) is called a kantha garment.
Split into simpler sentences: The use of kantha is popular in saris that are used by women in Bengal. Any garment or cloth with kantha embroidery (which forms or outlines decorative motifs with running stitch) is a kantha garment.