"type","value"
strict , "no"
digraph , "yes"
graph_id , "graph_19"
start_scope , "1"
start_subgraph , "1"
graph_id , "subgraph_19_1"
start_scope , "2"
start_subgraph , "2"
graph_id , "subgraph_19_2"
start_scope , "3"
end_scope , "3"
end_subgraph , "2"
end_scope , "2"
end_subgraph , "1"
end_scope , "1"