Fig. 7

Comparison of the strength and shape of some forbidden lines of LHA 120-S 73 seen in FEROS spectra from 1999 (black, solid), 2005 (red, dashed), 2014 (blue, dotted), and 2015 (purple, dashed-dotted), and in the du Pont data from 2008 (green, long-dashed), except for the [O i] λ 6300 line, which could not be corrected for telluric pollution.
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