Table 3: Extinction.
Diagnostic $c({\rm H}\beta)$

H $\alpha$ /H $\beta$ 0.692

He II $\lambda1640$ /He II $\lambda4686$ 0.641

H $\beta$ /5 GHz 0.629

H $\beta$ /1.4 GHz 0.477

Adopted 0.666

**Table 3:** Extinction.
Diagnostic	$c({\rm H}\beta)$
H $\alpha$ /H $\beta$	0.692
He II $\lambda1640$ /He II $\lambda4686$	0.641
H $\beta$ /5 GHz	0.629
H $\beta$ /1.4 GHz	0.477
Adopted	0.666

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