RRGbank

To change a label, click on a node to select a different label from a list. The syntactic category and the function tag (before and after the dash "-") must be selected separately by clicking on the corresponding part of the label.
To add a function tag to a node that does not have one yet, drag it from the list of function tags onto the node.
Re-attach a node by dragging and dropping it on a new parent. This can be used to created discontinuous constituents.
Similarly, nodes can be removed and new ones added by dragging to/from below the tree.
Finally, the bracketing can be edited manually in the text box below the tree; press "validate" to update the tree. Whitespace is ignored. Each token must have a dedicated POS tag.

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(S
  (NP-SBJ (NNS 0=Prosecutors))
  (VP
    (VBD 1=alleged)
    (SBAR
      (IN 2=that)
      (S
        (NP-SBJ-1 (PRP 3=she))
        (VP
          (VBD 4=was)
          (VP
            (VBG 5=trying)
            (S
              (NP-SBJ (-NONE- 6=*-1))
              (VP
                (TO 7=to)
                (VP
                  (VB 8=bolster)
                  (NP (NP (NNS 9=students) (POS 10=')) (NNS 11=scores))
                  (S-PRP
                    (NP-SBJ (-NONE- 12=*-1))
                    (VP
                      (TO 13=to)
                      (VP
                        (VB 14=win)
                        (NP (DT 15=a) (NN 16=bonus))
                        (PP-LOC
                          (IN 17=under)
                          (NP
                            (NP (DT 18=the) (NN 19=state) (POS 20='s))
                            (CD 21=1984)
                            (NNP 22=Education)
                            (NNP 23=Improvement)
                            (NNP 24=Act))))))))))))))
  (. 25=.))

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Supertags

	token	arc	supertag
1	Prosecutors	2	(NP (CORE_N (NUC_N (N <>))))
2	alleged	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (V <>))) (CLAUSE )))
3	that	6	(CLAUSE* (CLM <>))
4	she	6	(NP (PRO <>))
5	was	6	(CORE* (OP-TNS <>))
6	trying	2	(CLAUSE (CORE (CORE (NP ) (NUC (V <>))) (CORE )))
7	to	8	(CORE* (CLM <>))
8	bolster	6	(CORE (NUC (V <>)) (NP ))
9	students	11	(NP* (NPIP (NP (CORE_N (NUC_N (N <>))))))
10	'	9	(NP* (POS <>))
11	scores	8	(NP (CORE_N (NUC_N (N <>))))
12	to	13	(CORE* (CLM <>))
13	win	6	(CORE* (CORE (NUC (V <>)) (NP )))
14	a	15	(NP* (OP-DEF <>))
15	bonus	13	(NP (CORE_N (NUC_N (N <>))))
16	under	13	(CORE* (PP-PERI (CORE_P (NUC_P (P <>)) (NP ))))
17	the	18	(NP* (OP-DEF <>))
18	state	23	(NP* (NPIP (NP (CORE_N (NUC_N (N <>))))))
19	's	18	(NP* (POS <>))
20	1984	23	(CORE_N* (NP-PERI (CORE_N (NUC_Q (QNT <>)))))
21	Education	23	(NUC_N* (N-PROP <>))
22	Improvement	23	(NUC_N* (N-PROP <>))
23	Act	16	(NP (CORE_N (NUC_N (N-PROP <>))))
24	.	0	(SENTENCE (. <>))