BPT diagram using [N ii]/Hα and [O iii]/Hβ in different parts of the short burst host as well as a number of other published other long (dots) and short (squares) GRB hosts (data from the GHostS database: http://www.grbhosts.org, see text). Grey dots are galaxies from the SDSS DR9 with a S/N or at least 10 in all emission lines used. The dashed line represents the separation between normal H ii regions and AGN dominated emission. Evolution models (e.g. Dopita et al. 2006) roughly indicate increasing metallicity and age as indicated by the arrows.