[ Tree (Cell 1:1 3:8 (NodeHeader (HeaderSection 1))) [ Tree (Cell 1:3 1:7 NodePara) [ Tree (Cell 1:3 1:7 (NodeToken (TokenText "sec1"))) [] ] , Tree (Cell 2:1 2:8 (NodeHeader (HeaderSection 2))) [ Tree (Cell 2:4 2:8 NodePara) [ Tree (Cell 2:4 2:8 (NodeToken (TokenText "sec2"))) [] ] ] , Tree (Cell 3:1 3:8 (NodeHeader (HeaderSection 2))) [ Tree (Cell 3:4 3:8 NodePara) [ Tree (Cell 3:4 3:8 (NodeToken (TokenText "sec3"))) [] ] ] ] ]