Comparison between [C I] 492 GHz (black), ¹³CO(21) (black), H I (green), and ¹²CO(10) (orange) for five sources. For H I, the absorption spectrum from Brown et al. (2014) is shown for G337.920.48, while SGPS data are presented for the remaining sources. In addition, ¹²CO(10) spectra from the FUGIN (G14.490.14) and Mopra (G336.960.23 and G337.920.48) surveys are used. Over the [C I] 492 GHz and ¹³CO(21) spectra, the fitted Gaussians are overlaid in red. Finally, the source velocities and the secondary components that are seen in [C I] 492 GHz without corresponding ¹³CO(21) detections are indicated in blue and gray respectively.