**Table 1:** Emission line ratios $^{{\rm 1}}$ for Ark 564, corrected for E(B-V)=0.09.
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$^{{\rm 1}}$ Fluxes in the optical region, up to 8000 Å, were taken from E97. NIR lines, from 9000 Å and longward were taken from RVPP02.
^a Permitted line with contribution from the BLR.

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