Left: OH 119 μm line median velocities (v₅₀) as a function of bolometric luminosity. Following the criteria by Rupke et al. (2005), we classify gas with median velocity v₅₀ >  +50 km s⁻¹ as inflows (top, in red) and gas with v₅₀ <  −50 km s⁻¹ as outflows (bottom, in blue). Each galaxy is represented by a symbol: those in our sample are shown as colored circles, and additional samples of nearby AGNs, (U)LIRGs and QSOs, and z ∼ 0.3 HyLIRGs are shown as triangles, diamonds, and squares, respectively. The OH 119 μm line median velocities and bolometric luminosities of these galaxies are drawn from Stone et al. (2016), Veilleux et al. (2013), and Calderón et al. (2016). Right: OH 119 μm equivalent width as a function of bolometric luminosity. The samples of galaxies and the symbols are the same as in the left panel with the addition of the sample of ULIRGs from Spoon et al. (2013) shown as crosses.