What do the BILOU tags mean in Named Entity Recognition?

Question

Title pretty much sums up the question. I\'ve noticed that in some papers people have referred to a BILOU encoding scheme for NER as opposed to the typical BIO tagging sche

Answer 1

• B - 'begin'
• I - 'inside'
• L - 'last'
• O - 'outside/other'
• U - 'unigram'