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
  (PrDP
    (PP
      (CORE_P
        (NUC_P (P 0=Among))
        (NP
          (CORE_N
            (NUC_N (N 2=men))
            (CLAUSE-PERI
              (PrCS (NP-WH (PRO-WH 3=who)))
              (CORE
                (PP
                  (CORE_P
                    (NUC_P (P 6=with))
                    (NP (CORE_N (NUC_N (N 8=substance))) (OP-DEF 7=the))))
                (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 5=closely))))
                (NUC (V 4=worked))))
            (QP (CORE_Q (NUC_Q (QNT 1=33)))))))))
  (CLAUSE
    (OP-TNS 11=have)
    (CORE
      (NP
        (CORE_N
          (NUC_N (N 20=number))
          (CLAUSE-PERI (CORE (NUC (V 19=expected))))
          (NUC
            (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 15=than))))
            (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 14=more))))
            (NP (CORE_N (NUC_N (N 17=times)) (QNT 16=three)))))
        (OP-DEF 18=the))
      (NP (CORE_N (NUC_Q (QNT 10=28))))
      (NUC (V 12=died))))
  (. 21=.)
  (: 13=--)
  (, 9=,))

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(SENTENCE
  (PrDP
    (PP
      (CORE_P
        (NUC_P (P 0=Among))
        (NP
          (CORE_N
            (QP-PERI (CORE_Q (NUC_Q (QNT 1=33))))
            (NUC_N
              (N 2=men)
              (CLAUSE-PERI
                (PrCS (NP-REL (PRO-REL 3=who)))
                (CORE
                  (NUC (V 4=worked))
                  (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 5=closely))))
                  (PP
                    (CORE_P
                      (NUC_P (P 6=with))
                      (NP (OP-DEF 7=the) (CORE_N (NUC_N (N 8=substance))))))))))))))
  (CLAUSE
    (CORE (, 9=,) (NP (CORE_N (NUC_Q (QNT 10=28)))) (NUC (V 12=died)) (: 13=--))
    (OP-TNS 11=have))
  (PoDP
    (NP
      (CORE_N
        (NP-PERI
          (CORE_N
            (QP
              (CORE_Q
                (AP-PERI (CORE_A (NUC_A (A 14=more) (P 15=than))))
                (NUC_Q (QNT 16=three))))
            (NUC_N (N 17=times))))
        (AP-PERI (CORE_A (NUC_A (A 19=expected))))
        (NUC_N (N 20=number)))
      (OP-DEF 18=the)))
  (. 21=.))

Supertags

	token	arc	supertag
1	Among	0	(SENTENCE (PrDP (PP (CORE_P (NUC_P (P <>)) (NP )))))
2	33	3	(CORE_N* (QP-PERI (CORE_Q (NUC_Q (QNT <>)))))
3	men	1	(NP (CORE_N (NUC_N (N <>))))
4	who	5	(NP-REL (PRO-REL <>))
5	worked	3	(NUC_N* (CLAUSE-PERI (PrCS (NP-REL )) (CORE (NUC (V <>)) (PP ))))
6	closely	5	(CORE* (ADVP-PERI (CORE_ADV (NUC_ADV (ADV <>)))))
7	with	5	(PP (CORE_P (NUC_P (P <>)) (NP )))
8	the	9	(NP* (OP-DEF <>))
9	substance	7	(NP (CORE_N (NUC_N (N <>))))
10	,	13	(CORE* (, <>))
11	28	13	(NP (CORE_N (NUC_Q (QNT <>))))
12	have	13	(CORE* (OP-TNS <>))
13	died	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (V <>)))))
14	--	13	(CORE* (: <>))
15	more	17	(CORE_Q* (AP-PERI (CORE_A (NUC_A (A <>) (P )))))
16	than	15	(P <>)
17	three	18	(CORE_N* (QP (CORE_Q (NUC_Q (QNT <>)))))
18	times	21	(CORE_N* (NP-PERI (CORE_N (NUC_N (N <>)))))
19	the	21	(CORE_N* (OP-DEF <>))
20	expected	21	(CORE_N* (AP-PERI (CORE_A (NUC_A (A <>)))))
21	number	0	(SENTENCE (PoDP (NP (CORE_N (NUC_N (N <>))))))
22	.	0	(SENTENCE (. <>))