Cerium, Tellurium, Selenium, Technetium, Caesium, Nickel, Barium, Europium, Molybdenum, Cobalt, Manganese, Cadmium, Antimony, Indium, Phosphorus, Chlorine, Palladium, Zirconium, Iodine, Silver, Krypton, Calcium, Aluminium, Gadolinium, Praseodymium, Boron, Chromium, Strontium, Vanadium, Sulfur, Helium, Sodium, Beryllium, Carbon, Xenon, Fluorine, Iron, Argon, Silicon, Ruthenium, Samarium, Tin, Germanium, Titanium, Magnesium, Neon, Bromine, Zinc, Nitrogen, Rubidium, Arsenic, Terbium, Niobium, Promethium, Lithium, Hydrogen, Neodymium, Scandium, Gallium, Rhodium, Lanthanum, Yttrium, Oxygen, Copper. Is "Potassium" in the previous list? 
Provide no explanation, directly answer with only "Yes." or "No."