With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Medina was Muhammad's destination before his Hijrah.
text_B: Teslin is a waterproof synthetic printing medium manufactured by PPG Industries .. PPG Industries. PPG Industries. Teslin is a single-layer , uncoated film , and extremely strong .. Its official website states that it is recyclable and non-toxic .. The strength of the lamination peel of a Teslin sheet is 2-4 times stronger than other coated synthetic and coated papers .. Available thicknesses run from 7 mil to 18 mil , though only sizes 10 mil and 14 mil are sized at 8.5 '' by 11 '' for printing with most consumer printers .. mil. Thou ( length ). Also available are perforated versions , specifically , 1up , 2up , 3up , 6up , and 8up .. perforated. perforation. Teslin is commonly used for producing waterproof maps , door hangers , flash cards , horticultural tags , parking permits , and more .. Teslin is also widely used in the plastic gift and loyalty card industry .. In 1984 , the first Teslin-based plastic card was produced by Ron Goade , done through laminating the Teslin substrate after having been printed on and then cutting multiple cards out of the laminated sheet of Teslin .
not_related.