  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
$(G,G')$ of real reductive Lie group $G$ and its reductive subgroup $G'$ such
that there exist irreducible unitary representations $\pi$ of $G$, which are
admissible upon restriction to $G'$.
