Spectrum of UDS20394, one of the more intense CIII] emitters in the C3 sample, whose estimated parameters are log(M_⋆/M_⊙) = 9.32, SFR = 4.01 M_⊙ yr⁻¹, M_FUV = −20, M_Ks = −20.46, EW(Lyα) = 19.2 Å, and EW(CIII]) = 12.3 Å. The green faint line is the de-redshifted VANDELS spectrum and the black line is the same but resampled by a factor of 2. The blue line in the upper panels is the error spectrum. The red line in the intermediate panels is the scaled sky spectrum.