This model is the other possible fibration over a neighborhood of a point in $\Delta_{d}$ –in [7] this is called $(1,2)$ fibration. Let $Y=S^{1}\times B$ with $B$ and $\Delta\subset B$ as in Example 2.8. Let $Y^{\prime}=Y\setminus(\{p\}\times\Delta)$, where $p\in S^{1}$. Let $L\cong\mathbb{Z}^{2}$ and define $T(L)=L\otimes_{\mathbb{Z}}\mathbb{R}/\penalty L$. Now consider a principal $T(L)$-bundle $\pi^{\prime}:X^{\prime}\rightarrow Y^{\prime}$. Under some mild assumptions on $\pi^{\prime}$ (cf. [7] Prop. 2.9), there is a unique manifold $X$ with $X^{\prime}\subset X$ extending the topology of $X^{\prime}$ and a proper extension $\pi:X\rightarrow Y$ of $\pi^{\prime}$. The composition of $\pi$ with the projection $Y\rightarrow B$ defines a topological $T^{3}$-fibration, $f:X\rightarrow B$. The fibre of $f$ over $b\in B\setminus\Delta$ is $T^{3}$. The fibre over $b\in\Delta_{i}$ is homeomorphic to $S^{1}\times I_{1}$, whereas the fibre over the vertex $b_{0}\in\Delta$ is homeomorphic to $S^{1}\times T^{2}/\penalty(\{point\}\times T^{2})$. It is proved in [7] that the monodromy group of this model is generated, in some basis, by the inverse transpose of the matrices (3). The reader should not worry, at this point, for the lack of details in this description as we will give explicit Lagrangian models for this example later on.