Classification of Klein Four Symmetric Pairs of Holomorphic Type for ${\mathrm{E}}_{6(-14)}$

The author classifies Klein four symmetric pairs of holomorphic type for non-compact Lie group ${\mathrm{E}}_{6(-14)}$, which gives a class of pairs $(G,G^{\mathrm{\prime }})$ of real reductive Lie group $G$ and its reductive subgroup $G^{\mathrm{\prime }}$ such that there exist irreducible unitary representations $\pi$ of $G$, which are admissible upon restriction to $G^{\mathrm{\prime }}$.