Solved by KFrank in post #8 
              
              
                Hi Learner! 

Then (barring other noteworthy details) I would understand this as a 
multi-label, three-class classification problem. 
To illustrate what I meant by “additional structure”, consider the mapping 
between a set of three bits and the integers 0, …, 7, where, e.g., “011” is 
the binary re…