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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(SENTENCE
  (CLAUSE
    (CORE
      (NP
        (OP-DEF 0=Neither)
        (NP (CORE_N (NUC_N (N-PROP 1=Lorillard))))
        (CLM 2=nor)
        (NP
          (OP-DEF 3=the)
          (CORE_N
            (NUC_N (N 4=researchers))
            (CLAUSE-PERI
              (PrCS (NP-WH (PRO-WH 5=who)))
              (CORE
                (NUC (V 6=studied))
                (NP (OP-DEF 7=the) (CORE_N (NUC_N (N 8=workers)))))))))
      (NUC
        (AP (CORE_A (NUC_A (A 10=aware))))
        (PP
          (CORE_P
            (NUC_P (P 11=of))
            (NP
              (OP-DEF 12=any)
              (CORE_N (NUC_N (N 13=research)))
              (PP
                (CORE_P
                  (NUC_P (P 14=on))
                  (NP
                    (CORE_N
                      (NUC_N (N 15=smokers))
                      (PP
                        (CORE_P
                          (NUC_P (P 16=of))
                          (NP
                            (OP-DEF 17=the)
                            (CORE_N (NUC_N (N-PROP 18=Kent) (N 19=cigarettes))))))))))))))
      (. 20=.))
    (AUX-TNS 9=were)))

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Supertags

	token	arc	supertag
1	Neither	2	(NP* (CLM <>))
2	Lorillard	11	(NP (NP (CORE_N (NUC_N (N-PROP <>)))))
3	nor	5	(NP* (CLM <>))
4	the	5	(NP* (OP-DEF <>))
5	researchers	2	(NP* (NP (CORE_N (NUC_N (N <>)))))
6	who	7	(NP-REL (PRO-REL <>))
7	studied	5	(NUC_N* (CLAUSE-PERI (PrCS (NP-REL )) (CORE (NUC (V <>)) (NP ))))
8	the	9	(NP* (OP-DEF <>))
9	workers	7	(NP (CORE_N (NUC_N (N <>))))
10	were	11	(NUC* (AUX-TNS <>))
11	aware	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (AP (CORE_A (NUC_A (A <>))))) (PP (P ) (NP )))))
12	of	11	(P <>)
13	any	14	(NP* (OP-DEF <>))
14	research	11	(NP (CORE_N (CORE_N (NUC_N (N <>))) (PP )))
15	on	14	(PP (P <>) (NP ))
16	smokers	15	(NP (CORE_N (N <>) (PP )))
17	of	16	(PP (P <>) (NP ))
18	the	20	(NP* (OP-DEF <>))
19	Kent	20	(NUC_N* (N-PROP <>))
20	cigarettes	17	(NP (CORE_N (NUC_N (N <>))))
21	.	0	(SENTENCE (. <>))