From ad70b91e1e38b76103e8ca53d051bacd8293e31b Mon Sep 17 00:00:00 2001
From: Matthew Honnibal <honnibal+gh@gmail.com>
Date: Sun, 1 Apr 2018 13:47:16 +0200
Subject: [PATCH] Comment

---
 spacy/syntax/arc_eager.pyx | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/spacy/syntax/arc_eager.pyx b/spacy/syntax/arc_eager.pyx
index 365eeada8..d09f541f9 100644
--- a/spacy/syntax/arc_eager.pyx
+++ b/spacy/syntax/arc_eager.pyx
@@ -26,8 +26,12 @@ DEF USE_SPLIT = False
 
 cdef weight_t MIN_SCORE = -90000
 
-# Break transition from here
+# Break transition inspired by this paper:
 # http://www.aclweb.org/anthology/P13-1074
+# However, there's a significant difference in the constraints.
+# The most relevant factor is whether we predict Break early, or late:
+# do we wait until the root is on the stack, or do we predict when the last
+# word of the previous sentence is on the stack?
 cdef enum:
     SHIFT
     REDUCE