5$ spaxels of the IFU (each spaxel covering roughly a $10^{\prime\prime} \times 10^{\prime\prime}$ field). The PACS IFU $5\times5$ data cubes can also be integrated over a specific wavelength range to generate a 2-D line map. This process can be done for any line detected at a reasonable S/N.

### SPIRE Spectroscopy

We used the standard HIPE-SPIRE spectroscopy data reduction pipeline for the single-pointing mode (version 11 with SPIRE calibration tree version 11) to reduce all of the SPIRE spectroscopy data of HerPlaNS, but with the following three major modifications; (1) we extracted and reduced signal from each bolometer individually instead of signal from only the central bolometer as nominally done for single-pointing observations; (2) we applied the extended source flux calibration correction to our data; and (3) we used our own dedicated off-target sky observations for the background subtraction (Fig.\[6781example\]). Besides these extra steps, our reduction steps basically copy those described in the SPIRE Data Reduction Guide.[^4] The standard apodization function was applied to the data to minimize the ringing in the instrument line shape wings at the expense of spectral resolution.

At the end of these processes, each of the on-source (center and off-center) and off-sky pointings would yield 