Example of BPT diagrams for the individual spaxels in a galaxy. The individual spaxels with the H II-region-like spectra are denoted by the blue symbols, the spaxels with AGN-like spectra are shown by the dark symbols, and the red symbols are the spaxels with intermediate spectra. The solid and short-dashed curves mark the demarcation line between AGNs and H II regions defined by Kauffmann et al. (2003) and Kewley et al. (2001), respectively. The long-dashed line is the dividing line between Seyfert galaxies and LINERs defined by Cid et al. (2010).