Spectrum of SDSS J120429.34+495814.4 from the BOSS spectrograph. The source is classified as a star in SDSS-IV DR17, but it has the variability and colour parameters of a QSO candidate. The broad emission lines support the latter classification. This is one of 32 objects selected as a QSO candidate and whose SDSS spectra were classified as stars, of which 20% - 50% are QSOs based on visual inspection of the spectra. (SDSS-IV DR17, CC-BY license, skyserver.sdss.org/dr17/VisualTools/explore/summary?objId=1237658613058109587.)