Example of the impact of the nebular subtraction process on the SDSS spectrum of J1316+44 (left). The black and red lines show the original and nebular subtracted data, while the blue line shows the subtracted nebular model. A comparison of the percentage of the total flux allocated to the YSP in the unsubtracted and nebular subtracted data is shown on the right. The black line shows the one-to-one relation between the two values. Red and blue points represent objects classified as morphologically undisturbed and disturbed, respectively.