Rest-frame VIMOS spectrum of XID5395 (top) and the average VIMOS spectrum of five unobscured BL AGN (bottom) chosen in the same z and L bins of our target. In both panels, the dotted lines indicate the position of the MgII2800 (left) and [O II]3727 (right) lines. The y-axis scale is maintained in the two panels to ease a direct comparison of the two spectra; it is clear that the [O II] emission weakens, while the continuum becomes bluer and the MgII line becomes stronger in the bottom panel.