$\Newextarrow{\xhookrightarrow}{10,10}{0x21AA}$
9.14
\begin{equation} \label{equation:categorical-pullback-lm-accessible} \begin{gathered} \xymatrix@R =50pt@C=50pt{ \operatorname{\mathcal{C}}_{\pm } \ar [r]^-{G_{+}} \ar [d]^{G_{-}} & \operatorname{\mathcal{C}}_{+} \ar [d]^{ F_{+} } \\ \operatorname{\mathcal{C}}_{-} \ar [r]^-{ F_{-} } & \operatorname{\mathcal{C}}} \end{gathered} \end{equation}