To create the first representation, basic information was taken from the crystallographic information file (cif). The length and angle of the three translation vectors were scaled to a maximum value of 1 by dividing them by 10 and 180 degrees, respectively, giving us a (2,3) matrix. This matrix was padded with zeros to make it a (2,5) matrix. These make up the first two rows of our (7,5) dimensional matrix. The rest of the rows described each atomic site present in the unit cell. The first column stores the period of the element, followed by the group. The last three columns give us the fractional coordinates of the element. The rows were zero-padded if the number of sites is less than 5. We call this simple representation Rep1 and use it as a benchmark.