JWST/NIRSpec integrated spectrum of GS133. The black curve identifies the integrated spectrum; the total, multi-component best-fit curve is in red, while all individual Gaussian components are shown with different colours. The fit residuals are reported in the top panels. The most prominent emission lines are marked with grey vertical lines. Light and dark yellow shaded areas in the right panel mark the [O III] emission within ±2000 km s⁻¹ and ±1000 km s⁻¹, respectively, from the GS133 systemic redshift.