Table 2 RIPPER ruleset, where \(\log _{10}(T_1^*) = 0.0863\), \(\log _{10}(T_2^*) = 4.85\), \(\log _{10}(T_3^*) = 4.06\), \(\log _{10}(T_4^*) = 5.09\) and \(\log _{10}(T_5^*) = 3.75\)

1

(\(\lambda _8 \le T_1^*\)) \(\Rightarrow\) Label = UN  (143/6)

2

(\(\lambda _1 \ge T_2^*\)) \(\wedge\) (\(\lambda _3 \ge T_3^*\)) \(\Rightarrow\) Label = UN  (30/4)

3

(\(\lambda _1 \ge T_4^*\)) \(\wedge\) (\(\lambda _2 \ge T_5^*\)) \(\Rightarrow\) Label = UN  (47/19)

4

Label = AC  (778/34)