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
    (CLAUSE-PERI
      (PrCS (ADVP-WH (ADV-WH 0=When)))
      (CORE
        (NP
          (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 1=only))))
          (CORE_N (AP-PERI (CORE_A (NUC_A (A 2=civil)))) (NUC_N (N 3=liability))))
        (NUC (AUX-TNS 4=is) (V 5=involved))))
    (CORE
      (, 6=,)
      (NP (OP-DEF 7=this) (CORE_N (NUC_N (N 8=method))))
      (NUC (V 9=has))
      (NP
        (OP-DEF 10=the)
        (CORE_N (AP-PERI (CORE_A (NUC_A (A 11=undeniable)))) (NUC_N (N 12=strengths)))
        (PP
          (CORE_P
            (NUC_P (P 13=of))
            (NP
              (NP
                (CORE_N
                  (AP-PERI (CORE_A (NUC_A (A 14=factual))))
                  (NUC_N (N 15=specificity))))
              (CLM 16=and)
              (NP
                (CORE_N
                  (NUC_N (N 17=avoidance))
                  (PP
                    (CORE_P
                      (NUC_P (P 18=of))
                      (NP (CORE_N (NUC_N (N 19=overgeneralization))))))))))))
      (. 20=.))))

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(SENTENCE
  (CLAUSE
    (CORE
      (NP
        (CORE_N
          (NUC_N (N 12=strengths))
          (PP-PERI
            (CORE_P
              (NP
                (NP
                  (CORE_N
                    (NUC_N (N 15=specificity))
                    (AP-PERI (CORE_A (NUC_A (A 14=factual))))))
                (NP
                  (CORE_N
                    (NUC_N (N 17=avoidance))
                    (PP-PERI
                      (CORE_P
                        (NUC_P (P 18=of))
                        (NP (CORE_N (NUC_N (N 19=overgeneralization)))))))
                  (CLM 16=and)))
              (NUC_P (P 13=of))))
          (AP-PERI (CORE_A (NUC_A (A 11=undeniable)))))
        (OP-DEF 10=the))
      (NP (CORE_N (NUC_N (N 8=method))) (OP-DEF 7=this))
      (CORE-PERI
        (NUC
          (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 1=only))))
          (NP
            (CORE_N (NUC_N (N 3=liability)) (AP-PERI (CORE_A (NUC_A (A 2=civil)))))))
        (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 0=When))))
        (NUC (V 5=involved) (AUX-TNS 4=is)))
      (NUC (V 9=has))
      (. 20=.)
      (, 6=,))))

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Supertags

	token	arc	supertag
1	When	6	(CLAUSE-PERI* (CLM <>))
2	only	4	(CORE_N* (ADVP-PERI (CORE_ADV (NUC_ADV (ADV <>)))))
3	civil	4	(CORE_N* (AP-PERI (CORE_A (NUC_A (A <>)))))
4	liability	6	(NP (CORE_N (NUC_N (N <>))))
5	is	6	(NUC* (AUX-TNS <>))
6	involved	10	(CLAUSE* (CLAUSE-PERI (CORE (NP ) (NUC (V <>)))))
7	,	6	(CLAUSE-PERI* (, <>))
8	this	9	(NP* (OP-DEF <>))
9	method	10	(NP (CORE_N (NUC_N (N <>))))
10	has	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (V <>)) (NP ))))
11	the	13	(NP* (OP-DEF <>))
12	undeniable	13	(CORE_N* (AP-PERI (CORE_A (NUC_A (A <>)))))
13	strengths	10	(NP (CORE_N (NUC_N (N <>)) (PP )))
14	of	13	(PP (P <>) (NP ))
15	factual	16	(CORE_N* (AP-PERI (CORE_A (NUC_A (A <>)))))
16	specificity	14	(NP (NP (CORE_N (NUC_N (N <>)))))
17	and	18	(NP* (CLM <>))
18	avoidance	16	(NP* (NP (CORE_N (NUC_N (N <>)) (PP ))))
19	of	18	(PP (P <>) (NP ))
20	overgeneralization	19	(NP (CORE_N (NUC_N (N <>))))
21	.	10	(CORE* (. <>))