digraph G {
    ratio=0.65;
    margin=0;
    colorscheme=puor8;
    bgcolor=7;
    label="Rôle des commentaires\nSchultes (2013)"; 
    fontsize=24;
    fontcolor=5;
    subgraph cluster_1 {
    bgcolor=8;
    label="";
    
    node [colorscheme=puor8,
        color=2,
        shape = box,
        style = filled,
        fontsize=20];
    per[label="Perception"]
    
    node[color=3]
    per1[label="agressifs"]
    per2[label="stupides"]
    per3[label="non pertinents"]
    per->per1
    per->per2
    per->per3
    }

    subgraph cluster_2 {
    bgcolor=8;
    label="";

    node [colorscheme=puor8,
        color=2,
        shape = box,
        style = filled,
        fontsize=20];
    role[label="Rôle"]

    node[color=3]
    role1[label="discussion"]
    role2[label="expérience"]
    role3[label="sentiment"]
    role->role1
    role->role2
    role->role3
    }
}