Standard diagnostic diagram showing the classification scheme by Kewley et al. (2013). The line drawn in the diagram corresponds to the theoretical redshift-dependent curve used to separate purely SF galaxies from galaxies containing AGN (Kewley et al. 2013). Empty and filled squares correspond to the systemic and outflow components of the nuclear aperture; filled diamonds correspond to the outflow components of the off-nuclear apertures. Blue and red points represents XID2028 and XID5321 respectively. Upper arrows represent lower limits, due to undetected Hβ emission lines.