fix #499

Author: lagleki

chapters/14.xml

@@ -1429,7 +1429,7 @@
       <xref linkend="example-random-id-dPcI" />
       ? Not at all. A second rule relating to
       <valsi>bo</valsi>
-      is that where several
+      is that where two or more
       <valsi>bo</valsi>
       -marked connectives are used in succession, the normal Lojban left-grouping rule is replaced by a right-grouping rule. As a result,
       <xref linkend="example-random-id-YJeE" />