since S12 has value 1 appear more often than S11 in column3 based on the value in column1

How do you get that? As far as I can tell, in your example data, 1 occurs exactly once in column 3 for both S11 and S12, and exactly twice in column 1 for both S11 and S12. So what is the discriminator really? And what did you mean by "based on"? That's exceedingly vague.