In this case we have a discrete family with $c={3k\over{k+2}}$, where $k\geq 1$ is an integer number called level. In the limit $k\to+\infty$ one gets $X=SU(2)=S^{3}$ equipped with the standard metric. The corresponding bundle is the trivial bundle of trivial CFTs (with $c=0$ and $H=H^{0,0}={{\bf C}}$). Analogous picture holds for an arbitrary compact simply connected simple group $G$.