Based on the best results (BLSTM-CNN-CRF), error analysis is performed based on five types of errors (No extraction, No annotation, Wrong range, Wrong tag, Wrong range and tag), in a way similar to BIBREF10, but we analyze on both gold labels and predicted labels (more detail in figure 1 and 2). 
 Question: What type of errors were produced by the BLSTM-CNN-CRF system?
No extraction, No annotation, Wrong range, Wrong tag, Wrong range and tag