a: left: comparison between the local L_IR–L_[NII]122 relation for local SFGs (black dashed line) and high-redshift detections of [NII]122 μm line. The shaded area shows the 95% prediction interval for the local relation. The pink + sign indicates a detection for the [NII]122 μm line (De Breuck et al. 2019), while symbols with arrows indicate upper limits for high-redshift sources (Harikane et al. 2020). b: centre: comparison between the local L_IR–L_[OI]63 relation for local SFGs (black dashed line) and high-redshift detections of the [OI]63 μm line (pink symbol Rybak et al. 2020). c: right: comparison between the local L_IR–L_[OI]145 relation for local SFGs (black dashed line) and high-redshift detections of [OI]145 μm line (pink symbol De Breuck et al. 2019). The shaded area shows the 95% prediction interval for the local relation. Grey stars show local SFGs, while grey triangles show local LMGs.