Example ALMA Band 7 images. From top to bottom and left to right: J010524.39-002527.1: single 870 μm counterpart centred on the SDSS coordinates; J021417.64-010524.8: ALMA 870 μm counterpart centred at the location of the quasar, with secondary counterpart; J015017.71+002902.4: ALMA 870 μm counterpart centred at the location of the quasar, with two secondary, brighter counterparts; J005921.54+004350.0: single 870 μm counterpart, not associated with the SDSS quasar; J014555.58-003125.8: three 870 μm counterparts, none of which are associated with the quasar; and J020327.40-001625.9: no detection. The ALMA beam is shown as a black ellipse at the bottom left corner of each image.