Spectra of CN (focusing on the brightest N = 3−2, J = 7∕2−5∕2 components) and the main CO isotopologs for Sz 71 (top panels) and Sz 98 (bottom panels). Arrows show the velocities of foreground cloud material (partially) absorbing the ¹²CO line. Vertical dotted lines indicate the source velocity. The scale of the y-axis varies between panels. All spectra were extracted in an aperture overlapping with the detection in the moment-zero map (for ¹²CO), or in a 2″ aperture on the source location (for CN and ¹³CO).