Composite radio spectra for two different electron events. Top: event of 18 June 2000. Bottom: event of 13 July 2004. With the vertical blue line and dashed lines we present the proton release time derived from the VDA analysis and its uncertainty, respectively; with the vertical green line and dashed lines we present the electron release time derived from the VDA analysis and its uncertainty, respectively; with the black dash-dotted line, we present the start of the type III burst.