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=For)) (NP (CORE_N (NUC_N (N 1=starters)))))))
  (CLAUSE
    (CORE
      (, 2=,)
      (NP (OP-DEF 3=the) (CORE_N (NUC_N (N 4=executives))))
      (NUC (V 5=joined))
      (NP
        (CORE_N
          (NUC_N
            (N-PROP 6=Mayor)
            (N-PROP 7=William)
            (N-PROP 8=H.)
            (N-PROP 9=Hudnut)
            (N-PROP 10=III))))
      (PP
        (CORE_P
          (NUC_P (P 11=for))
          (NP
            (OP-DEF 12=an)
            (CORE_N (NUC_N (N 13=evening)))
            (PP
              (CORE_P
                (NUC_P (P 14=of))
                (NP
                  (NP
                    (OP-DEF 15=the)
                    (CORE_N
                      (NUC_N (N-PROP 16=Indianapolis) (N-PROP 17=Symphony) (N-PROP 18=Orchestra))))
                  (CLM 19=and)
                  (NP
                    (OP-DEF 20=a)
                    (CORE_N
                      (NUC_N (N 21=guest) (N 22=pianist-comedian) (N-PROP 23=Victor) (N-PROP 24=Borge))))))))))
      (. 25=.))))

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(SENTENCE
  (PrDP (PP (CORE_P (NUC_P (P 0=For)) (NP (CORE_N (NUC_N (N 1=starters)))))))
  (CLAUSE
    (CORE
      (PP-PERI
        (CORE_P
          (NUC_P (P 11=for))
          (NP
            (CORE_N
              (NUC_N (N 13=evening))
              (PP-PERI
                (CORE_P
                  (NP
                    (NP
                      (CORE_N
                        (NUC_N (N-PROP 18=Orchestra) (N-PROP 17=Symphony) (N-PROP 16=Indianapolis)))
                      (OP-DEF 15=the))
                    (NP
                      (CORE_N
                        (NUC_N (N-PROP 24=Borge) (N-PROP 23=Victor) (N 22=pianist-comedian) (N 21=guest)))
                      (OP-DEF 20=a)
                      (CLM 19=and)))
                  (NUC_P (P 14=of)))))
            (OP-DEF 12=an))))
      (NP
        (CORE_N
          (NUC_N
            (N-PROP 10=III)
            (N-PROP 9=Hudnut)
            (N-PROP 8=H.)
            (N-PROP 7=William)
            (N-PROP 6=Mayor))))
      (NP (CORE_N (NUC_N (N 4=executives))) (OP-DEF 3=the))
      (NUC (V 5=joined))))
  (. 25=.)
  (, 2=,))

				[...wait for it...]

(SENTENCE
  (PrDP (PP (CORE_P (NUC_P (P 0=For)) (NP (CORE_N (NUC_N (N 1=starters)))))))
  (CLAUSE
    (CORE
      (, 2=,)
      (NP (OP-DEF 3=the) (CORE_N (NUC_N (N 4=executives))))
      (NUC (V 5=joined))
      (NP
        (CORE_N
          (NUC_N
            (N-PROP 6=Mayor)
            (N-PROP 7=William)
            (N-PROP 8=H.)
            (N-PROP 9=Hudnut)
            (N-PROP 10=III))))
      (PP
        (CORE_P
          (NUC_P (P 11=for))
          (NP
            (OP-DEF 12=an)
            (CORE_N
              (NUC_N (N 13=evening))
              (PP
                (P 14=of)
                (NP
                  (NP
                    (OP-DEF 15=the)
                    (CORE_N
                      (NUC_N (N-PROP 16=Indianapolis) (N-PROP 17=Symphony) (N-PROP 18=Orchestra))))
                  (NP
                    (CLM 19=and)
                    (OP-DEF 20=a)
                    (CORE_N
                      (NUC_N (N 21=guest) (N 22=pianist-comedian) (N-PROP 23=Victor) (N-PROP 24=Borge))))))))))))
  (. 25=.))

Supertags

	token	arc	supertag
1	For	0	(SENTENCE (PrDP (PP (CORE_P (NUC_P (P <>)) (NP )))))
2	starters	1	(NP (CORE_N (NUC_N (N <>))))
3	,	6	(CORE* (, <>))
4	the	5	(NP* (OP-DEF <>))
5	executives	6	(NP (CORE_N (NUC_N (N <>))))
6	joined	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (V <>)) (NP ) (PP ))))
7	Mayor	11	(NUC_N* (N-PROP <>))
8	William	11	(NUC_N* (N-PROP <>))
9	H.	11	(NUC_N* (N-PROP <>))
10	Hudnut	11	(NUC_N* (N-PROP <>))
11	III	6	(NP (CORE_N (NUC_N (N-PROP <>))))
12	for	6	(PP (CORE_P (NUC_P (P <>)) (NP )))
13	an	14	(NP* (OP-DEF <>))
14	evening	12	(NP (CORE_N (NUC_N (N <>)) (PP )))
15	of	14	(PP (P <>) (NP ))
16	the	19	(NP* (OP-DEF <>))
17	Indianapolis	19	(NUC_N* (N-PROP <>))
18	Symphony	19	(NUC_N* (N-PROP <>))
19	Orchestra	15	(NP (NP (CORE_N (NUC_N (N-PROP <>)))))
20	and	23	(NP* (CLM <>))
21	a	23	(NP* (OP-DEF <>))
22	guest	23	(NUC_N* (N <>))
23	pianist-comedian	19	(NP* (NP (CORE_N (NUC_N (N <>)))))
24	Victor	23	(NUC_N* (N-PROP <>))
25	Borge	23	(NUC_N* (N-PROP <>))
26	.	0	(SENTENCE (. <>))