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\label{fig:glue}--A \label{fig:glue}: A  demonstration of how radial velocities were extracted using Glue. First, points were selected along the extinction feature (blues circles in upper left image) and overlaid on the CO (GRS) or N2H+ (MALT90) fits cube (blue points in upper right image). A spectrum was extracted from the the small red boxed region around the points (bottom image). Then, a Gaussian was fitted around the highest peak in intensity.