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
    (OP-TNS 4=be)
    (CLM 0=But)
    (CORE
      (NP
        (CORE_N
          (NUC_N (N 7=climate))
          (PP-PERI
            (CORE_P
              (NUC_P (P 8=for))
              (NP
                (CORE_N
                  (NUC_N (N 10=turmoil) (N 12=uncertainty) (CLM 11=and))
                  (PP-PERI
                    (CORE_P
                      (NUC_P (P 13=in))
                      (NP
                        (CORE_N
                          (NUC_N (N 17=country))
                          (CLAUSE-PERI
                            (CORE
                              (ADVP-PERI
                                (CORE_ADV (NUC_ADV (ADV 15=racially))))
                              (NUC (V 16=divided)))))
                        (OP-DEF 14=this))))
                  (AP-PERI (CORE_A (NUC_A (A 9=more)))))))))
        (OP-DEF 6=a))
      (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 3=instead))))
      (OP-MOD 2=may)
      (NP (CORE_N (NUC_N (N-PROP 1=Pretoria))))
      (NUC (V 5=creating)))
    (. 18=.)))

				[...wait for it...]

(SENTENCE
  (CLAUSE
    (CLM 0=But)
    (CORE
      (NP (CORE_N (NUC_N (N-PROP 1=Pretoria))))
      (OP-MOD 2=may)
      (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 3=instead))))
      (NUC (OP-ASP 4=be) (V 5=creating))
      (NP
        (OP-DEF 6=a)
        (CORE_N
          (NUC_N (N 7=climate))
          (PP-PERI
            (CORE_P
              (NUC_P (P 8=for))
              (NP
                (CORE_N
                  (QP-PERI (CORE_Q (NUC_Q (QNT 9=more))))
                  (NUC_N (N 10=turmoil) (CLM 11=and) (N 12=uncertainty))
                  (PP-PERI
                    (CORE_P
                      (NUC_P (P 13=in))
                      (NP
                        (OP-DEF 14=this)
                        (CORE_N
                          (AP-PERI
                            (CORE_A
                              (ADVP-PERI
                                (CORE_ADV (NUC_ADV (ADV 15=racially))))
                              (NUC_A (V-PART 16=divided))))
                          (NUC_N (N 17=country))))))))))))))
  (. 18=.))

Supertags

	token	arc	supertag
1	But	6	(CLAUSE* (CLM <>))
2	Pretoria	6	(NP (CORE_N (NUC_N (N-PROP <>))))
3	may	6	(CORE* (OP-MOD <>))
4	instead	6	(CORE* (ADVP-PERI (CORE_ADV (NUC_ADV (ADV <>)))))
5	be	6	(NUC* (OP-ASP <>))
6	creating	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (V <>)) (NP ))))
7	a	8	(NP* (OP-DEF <>))
8	climate	6	(NP (CORE_N (NUC_N (N <>))))
9	for	8	(CORE_N* (PP-PERI (CORE_P (NUC_P (P <>)) (NP ))))
10	more	13	(CORE_N* (QP-PERI (CORE_Q (NUC_Q (QNT <>)))))
11	turmoil	13	(NUC_N* (N <>))
12	and	13	(NUC_N* (CLM <>))
13	uncertainty	9	(NP (CORE_N (NUC_N (N <>))))
14	in	13	(CORE_N* (PP-PERI (CORE_P (NUC_P (P <>)) (NP ))))
15	this	18	(NP* (OP-DEF <>))
16	racially	17	(CORE_A* (ADVP-PERI (CORE_ADV (NUC_ADV (ADV <>)))))
17	divided	18	(CORE_N* (AP-PERI (CORE_A (NUC_A (V-PART <>)))))
18	country	14	(NP (CORE_N (NUC_N (N <>))))
19	.	0	(SENTENCE (. <>))