NOEMA Band 2 spectra and dust continuum maps for the QSOs PJ007+04 and PJ009-10. The clean beam is reported in the bottom left corner of each continuum map. Panel (a): spectrum of the QSO PJ007+04 extracted over a region corresponding to the clean beam, with channel widths of 50 km/s. The light blue curve represents the fitted model, consisting of a constant continuuum and, in case of detection, some Gaussian line components. Panel (b): 158 GHz dust continuum map of the QSO PJ007+04 (contours at 3, 6 and 9 σ). Panel (c): same as panel (a) but for the QSO PJ009-10. Panel (d): same as panel (b) but for the QSO PJ009-10 (contours at 3, 9, 15, 21 and 27 σ).