Hi @OmarFarag95. From Introducing Entity Roles and Groups: “Using one CRF for entity labels and one for role labels worked best on both datasets and resulted in an F1 score that was a point higher compared to the other approaches” 
Hi @OmarFarag95. From Introducing Entity Roles and Groups: “Using one CRF for entity labels and one for role labels worked best on both datasets and resulted in an F1 score that was a point higher compared to the other approaches”