name_x|score|date|class1
name_y|score|date|class2
name_y|score|date|class2
name_a|score|date|class2
name_b|score|date|class3
name_z|score|date|class1
name_b|score|date|class3
name_x|score|date|class1
name_b|score|date|class3
name_c|score|date|class2
name_c|score|date|class3
name_c|score|date|class3
...and so on

##</code><code>##

_class1_
name_x = 2
name_z = 1

_class2_
name_y = 2
name_c = 1

_class3_
name_b = 3
name_c = 2