Fit of the RVS spectrum (blue histogram) of the RGB star Gaia DR3 1434412634690504192 around its cerium line. The model in green corresponds to the GAUGUIN solution [Ce/Fe] = 0.26 dex (in excellent agreement with the literature value) whereas those in orange have [Ce/Fe] = −2.0 dex (almost no cerium) and ±0.2 dex around the GAUGUIN abundance, respectively. The S/N is 907 and the broadening velocity is equal to 10.4 km s⁻¹. See text for more details.