1 [ Tree (Cell 1:1 2:6 (NodeHeader (HeaderSection 1)))
2 [ Tree (Cell 1:3 1:7 NodePara)
3 [ Tree (Cell 1:3 1:7 (NodeToken (TokenText "sec1"))) []
5 , Tree (Cell 2:1 2:6 NodePara)
6 [ Tree (Cell 2:1 2:6 (NodeToken (TokenText "text1"))) []
9 , Tree (Cell 3:1 3:7 (NodeHeader (HeaderSection 1)))
10 [ Tree (Cell 3:3 3:7 NodePara)
11 [ Tree (Cell 3:3 3:7 (NodeToken (TokenText "sec2"))) []