Fig. 3

The annotation process of developing the annotation guidelines and the final annotation. The annotation task was an iterative process that started with a subset of sentences. Two annotators annotated the subset of sentences, calculated the inter-annotator agreement, and checked the agreements. If disagreements existed, a third annotator resolved the disagreements between the two annotators. Then, the annotators revised and drafted the annotation guidelines. This was an iterative process until no further disagreements existed