Metallicity gradients, 12+log(O/H) and log(N/O), in our sample of LINER-like galaxies. Nuclear estimations of the corresponding chemical abundance ratio are represented as follows: green triangles are the estimations from AGN models with α_OX = −1.6; orange and red stars are the estimations from pAGB models with T_eff = 10⁵ K and T_eff = 1.5 ⋅ 10⁵ K respectively; and black squares are the estimations from ADAF models. Red vertical lines mark the break point, and red shaded areas their corresponding uncertainty.