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import spacy
from spacy.tokens import Span
nlp = spacy.load('en_core_web_sm')
doc = nlp(u"Tissue is the newest North American company.")
ORG = doc.vocab.strings[u"ORG"]
new_ent = Span(doc,0,1,label=ORG)
doc.ents = list(doc.ents) + [new_ent]