bug fixes (section 4, slides)

Section04-Phrasal-and-Syntactic-Models/section04.tex

@@ -4979,7 +4979,7 @@ $x$表示叶子非终结符(可替换的变量)，显然这是调序规则
 \alpha_h & = & \textrm{VP} \nonumber \\
 \beta_h & = & \textrm{VP}\ (=\alpha_h) \nonumber \\
 \alpha_r & = & \textrm{VP(VV(提高) NN:}x) \nonumber \\
-\beta_r & = & \textrm{increases\ NN:}x \nonumber \\
+\beta_r & = & \textrm{VP(increases\ NN:}x) \nonumber \\
 \sim & = & \{1-1\} \nonumber
 \end{eqnarray}
 }