Emission from the Hα and Hβ BLR lines, and the [O III] λ5007 broad component as a function of the velocity. Both the subtracted-data (solid lines) and the fitted models (semitransparent thick curves) are shown. The systemic velocity, set by the vertical gray line, is based on the [C II] redshift. The Hα and Hβ lines are offset of a small amount compared to the zero-reference point (Δv_Hα = −149 ± 7 km s⁻¹ and Δv_Hβ = 87 ± 15 km s⁻¹). On the other hand, the [O III] λ5007 broad component shows a velocity blueshift of Δv_{[O III]} = −1922 ± 39 km s⁻¹ and a FWHM([O III]) = ${2776}_{-74}^{+75}$ km s⁻¹. This blueshifted emission highlights possible outflowing material from the quasar host galaxy.