[ Tree (Cell 1:1 4:9 (NodeHeader (HeaderSection 1))) [ Tree (Cell 1:3 1:7 NodePara) [ Tree (Cell 1:3 1:7 (NodeToken (TokenText "sec1"))) [] ] , Tree (Cell 2:1 3:11 (NodeHeader (HeaderSection 2))) [ Tree (Cell 2:4 2:9 NodePara) [ Tree (Cell 2:4 2:9 (NodeToken (TokenText "sec11"))) [] ] , Tree (Cell 3:1 3:11 (NodeHeader (HeaderSection 3))) [ Tree (Cell 3:5 3:11 NodePara) [ Tree (Cell 3:5 3:11 (NodeToken (TokenText "sec111"))) [] ] ] ] , Tree (Cell 4:1 4:9 (NodeHeader (HeaderSection 2))) [ Tree (Cell 4:4 4:9 NodePara) [ Tree (Cell 4:4 4:9 (NodeToken (TokenText "sec12"))) [] ] ] ] , Tree (Cell 5:1 5:7 (NodeHeader (HeaderSection 1))) [ Tree (Cell 5:3 5:7 NodePara) [ Tree (Cell 5:3 5:7 (NodeToken (TokenText "sec2"))) [] ] ] , Tree (Cell 6:1 6:7 (NodeHeader (HeaderSection 1))) [ Tree (Cell 6:3 6:7 NodePara) [ Tree (Cell 6:3 6:7 (NodeToken (TokenText "sec3"))) [] ] ] ]