Supplementary_Figure – Supplemental material for “Where is the love?” Topics and prosocial behavior in German popular music lyrics from 1954 to 2014 RuthNicolas 2018 <p>Supplemental material, Supplementary_Figure for “Where is the love?” Topics and prosocial behavior in German popular music lyrics from 1954 to 2014 by Nicolas Ruth in Musicae Scientiae</p>