From 8c354c432bbe94bed59da9a8decd45336bae89ba Mon Sep 17 00:00:00 2001
From: Matthew Honnibal <honnibal@gmail.com>
Date: Fri, 10 Apr 2015 04:59:59 +0200
Subject: [PATCH] * Add ValueError condition to ner_tag reading

---
 spacy/syntax/ner.pyx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/spacy/syntax/ner.pyx b/spacy/syntax/ner.pyx
index c2597bc7e..0a40ed9a8 100644
--- a/spacy/syntax/ner.pyx
+++ b/spacy/syntax/ner.pyx
@@ -76,6 +76,8 @@ cdef class BiluoPushDown(TransitionSystem):
         for (raw_text, toks, (ids, words, tags, heads, labels, biluo)) in gold_tuples:
             for i, ner_tag in enumerate(biluo):
                 if ner_tag != 'O' and ner_tag != '-':
+                    if ner_tag.count('-') != 1:
+                        raise ValueError(ner_tag)
                     _, label = ner_tag.split('-')
                     for move_str in ('B', 'I', 'L', 'U'):
                         move_labels[moves.index(move_str)][label] = True