Explain SemEval system.
SemEval is an evaluation technique used in NER which performs semantic analysis and they are implemented to explore the meaning of words in a sentence or a document. They introduced four different ways for evaluation. They are
Strict evaluation- exact match between surface string and entity
Exact Evaluation- exact match of surface string
Partial Evaluation- partial match of surface string
Type Evaluation- overlap between entities of system and gold annotation.