"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"
