multi-label-article-repository-clf: annotate sample of 100 article-repository pairs for initial free form analysis for multi-label classification

[evamaxfield]

With the binary model work going well, its time to move to the multi-label classification model and before we can annotate a large batch of article-repositories pairs, we need to nail down the annotation schema.

Going to annotate a sample of 100 article-repository pairs from our existing training and evaluation set.