  In [Phys. Rev. Lett. 105, 100507 (2010)], Borsten et al. derived 31
entanglement families of four qubits by using the black-hole vs. qubit
correspondence, which can be reduced to nine up to permutation of the four
qubits under stochastic local operations and classical communication (SLOCC).
In this paper, we investigate the classification of "large" black holes by
using the local unitary operator (LU) entanglement classification of three
qubits. We relate the LU entanglement classes of the GHZ SLOCC class of three
qubits to different classes of "large" black holes. Thus, we partition "large"
black holes into seven inequivalent families. We show that between two black
holes with four non-vanishing charges $q_{0}$, $p^{1}$, $p^{2}$, and $p^{3}$,
if the only difference is the signs of the charges, then they are LU
equivalent. Thus, the partition of black holes is independent of the signs of
the charges and is only related to the ratio of the absolute charges.
