Before revision:  All the techniques used are not problem-specific and should be generalizable to help in other tasks and contexts .
After revision:  Qualitative analysis is provided to verify that the new model performs better for all target classes. Additionally, multiple structural observations about the causes of the underperformance of some architectures are revealed. All the source codes, parameters and implementation details are published together with the dataset in the hope to push the research boundaries since all the techniques used in this work are not problem-specific and should be generalizable to help in other tasks and contexts .