* Possessive test passing

spacy/en.pyx

@@ -155,11 +155,22 @@ cdef Lexeme* _init_lexeme(unicode string, StringHash hashed,
 
 cdef size_t _find_split(unicode word, size_t length):
     cdef size_t i = 0
-    if word[0].isalnum():
-        while i < length and word[i].isalnum():
+    if not is_punct(word, 0, length):
+        while i < length and not is_punct(word, i, length):
             i += 1
     else:
         # Split off a punctuation character, or a sequence of the same punctuation character
-        while i < length and not word[i].isalnum() and (i == 0 or word[i-1] == word[i]):
+        while i < length and is_punct(word, i, length) and (i == 0 or word[i-1] == word[i]):
             i += 1
     return i
+
+cdef bint is_punct(unicode word, size_t i, size_t length):
+    if word[i] == "'":
+        if i >= (length - 1):
+            return True
+        elif word[i + 1] == 's' and i != 0:
+            return True
+        else:
+            return False
+    else:
+        return not word[i].isalnum()