st $k/0$ comments   -------------------------    : Feature set for the baseline [*CasPred*]{}, where $T$:= set of unique terms in corpus, $tf_t$:= term frequency of term $t\in T$ in the submission, $|w|$:= number of words in the submission, $|cw|$:= number of words in the submission with more than 0 letters, $|s|$:= number of sentences in the submission, $k$:= observable discussion size, $t_i$:= time when $i$-th comment was put, $t_0$:= time of submission. \* signifies a feature not in the original paper but added by us.  & $\frac{0}{k/0-0}\sum_{i=