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
      (CORE
        (NP (CORE_N (NUC_N (N 1=PCs)) (AP-PERI (CORE_A (NUC_A (A 0=Current))))))
        (NUC
          (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 3=more) (ADV 4=than))))
          (AUX-TNS 2=are)
          (NP
            (CORE_N
              (NUC_N (N 6=times))
              (AP-PERI (CORE_A (NUC_A (A 7=faster))))
              (QNT 5=50)))))
      (CORE
        (NP
          (CORE_N
            (NUC_N (N 11=capacity) (N 10=memory))
            (NP-PERI
              (CORE_N
                (NUC_N (N 13=times))
                (PP-PERI
                  (CORE_P
                    (NUC_P (P 15=than))
                    (NP
                      (CORE_N
                        (NUC_N (N 18=counterparts))
                        (QP (CORE_Q (NUC_Q (QNT 17=1977)))))
                      (OP-DEF 16=their))))
                (AP-PERI (CORE_A (NUC_A (A 14=greater))))
                (QNT 12=500)))))
        (NUC (NP (CORE_N (NUC_N (N 9=have)))))
        (CLM 8=and))
      (. 19=.))))

				[...wait for it...]

(SENTENCE
  (CLAUSE
    (CORE
      (NP (CORE_N (AP-PERI (CORE_A (NUC_A (A 0=Current)))) (NUC_N (N 1=PCs))))
      (NUC
        (AUX-TNS 2=are)
        (AP
          (CORE_A
            (NP-PERI
              (CORE_N
                (QP
                  (CORE_Q
                    (QP (CORE_Q (NUC_Q (QNT 3=more) (ADV 4=than))))
                    (NUC_Q (QNT 5=50))))
                (NUC_N (N 6=times))))
            (NUC_A (A 7=faster)))))))
  (CLAUSE
    (CORE
      (CLM 8=and)
      (NUC (V 9=have))
      (NP
        (CORE_N
          (NUC_N (N 10=memory) (N 11=capacity))
          (AP-PERI
            (CORE_A
              (NP-PERI
                (CORE_N
                  (QP (CORE_Q (NUC_Q (QNT 12=500))))
                  (NUC_N (N 13=times))))
              (NUC_A (A 14=greater))
              (PP
                (CORE_P
                  (NUC_P (P 15=than))
                  (NP
                    (OP-DEF 16=their)
                    (CORE_N
                      (NP-PERI (CORE_N (NUC_Q (QNT 17=1977))))
                      (NUC_N (N 18=counterparts))))))))))))
  (. 19=.))

Supertags

	token	arc	supertag
1	Current	2	(CORE_N* (AP-PERI (CORE_A (NUC_A (A <>)))))
2	PCs	8	(NP (CORE_N (NUC_N (N <>))))
3	are	8	(NUC* (AUX-TNS <>))
4	more	6	(CORE_Q* (QP (CORE_Q (NUC_Q (QNT <>) (ADV )))))
5	than	4	(ADV <>)
6	50	7	(CORE_N* (QP (CORE_Q (NUC_Q (QNT <>)))))
7	times	8	(CORE_A* (NP-PERI (CORE_N (NUC_N (N <>)))))
8	faster	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (AP (CORE_A (NUC_A (A <>))))))))
9	and	10	(CORE* (CLM <>))
10	have	0	(SENTENCE (CLAUSE (CORE (NUC (V <>)) (NP ))))
11	memory	12	(NUC_N* (N <>))
12	capacity	10	(NP (CORE_N (NUC_N (N <>))))
13	500	14	(CORE_N* (QP (CORE_Q (NUC_Q (QNT <>)))))
14	times	15	(CORE_A* (NP-PERI (CORE_N (NUC_N (N <>)))))
15	greater	12	(CORE_N* (AP-PERI (CORE_A (NUC_A (A <>)) (PP ))))
16	than	15	(PP (CORE_P (NUC_P (P <>)) (NP )))
17	their	19	(NP* (OP-DEF <>))
18	1977	19	(CORE_N* (NP-PERI (CORE_N (NUC_Q (QNT <>)))))
19	counterparts	16	(NP (CORE_N (NUC_N (N <>))))
20	.	0	(SENTENCE (. <>))