\begin{gather}
	\boldsymbol{\hat{{h}}}^{lm}_{t} = \text{GRU}_1(\boldsymbol{E}(\mathrm{y}_{t-1}), 
        \boldsymbol{{h}}^{lm}_{t-1}) \\ 
        \boldsymbol{{h}}^{lm}_{t} = \text{GRU}_2(\boldsymbol{{c}}_{void},  \boldsymbol{\hat{{h}}}^{lm}_{t}) \\
        \text{p}({\mathrm{y}}^{lm}_t|{\mathrm{y}}_{t-1}) = \sigma( \boldsymbol{{W}}_o \phi( \boldsymbol{{W}}_{{h}} \boldsymbol{{h}}^{lm}_{t}  +  \boldsymbol{{W}}_{\mathrm{y}} \boldsymbol{E}({\mathrm{y}}_{t-1}))).
\end{gather}
