A method for purifying N–2-pyrrolidone is disclosed. Also, a mask layer is formed on a substrate, then an AlN layer is formed to cover it, and then the AlN layer is lifted off by using a solution for etching. The soft tissue attachment component is moveable with respect to the prosthesis while connected thereto. Two more community cards are revealed and the winning hand is determined where each hand is a combination of the first two cards and the five community cards.