RRGparbank

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.

				[...wait for it...]

(SENTENCE
  (CLAUSE
    (CORE
      (NP (PRO-DEM 0=There))
      (NUC (V 1=were))
      (NP
        (CORE_N
          (NUC_N
            (N 2=times)
            (CLAUSE-PERI
              (PrCS (ADVP-REL (ADV-REL 3=when)))
              (CORE
                (NP (OP-DEF 4=his) (CORE_N (NUC_N (N 5=nerve))))
                (NUC (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 6=so)))) (V 7=forsook))
                (NP (PRO 8=him)))
              (CLAUSE
                (CLM 9=that)
                (CORE
                  (NP (PRO 10=he))
                  (NUC (NUC (V 11=began)) (NUC (V 12=shouting)))
                  (PP (P 13=for) (NP (CORE_N (NUC_N (N 14=mercy)))))
                  (PP-PERI
                    (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 15=even))))
                    (CORE_P
                      (NUC_P (P 16=before))
                      (CLAUSE
                        (CORE
                          (NP (OP-DEF 17=the) (CORE_N (NUC_N (N 18=beating))))
                          (NUC (V 19=began))))))))
              (, 20=,))
            (CLAUSE-PERI
              (PrCS (ADVP-REL (ADV-REL 21=when)))
              (CORE
                (NP
                  (OP-DEF 22=the)
                  (CORE_N
                    (AP-PERI (CORE_A (NUC_A (A 23=mere))))
                    (NUC_N (N 24=sight))
                    (PP
                      (P 25=of)
                      (NP
                        (OP-DEF 26=a)
                        (CORE_N
                          (NUC_N
                            (N 27=fist)
                            (CORE-PERI
                              (NUC (V 28=drawn))
                              (ADVP (CORE_ADV (NUC_ADV (ADV 29=back))))
                              (PP-PERI
                                (CORE_P
                                  (NUC_P (P 30=for))
                                  (NP
                                    (OP-DEF 31=a)
                                    (CORE_N (NUC_N (N 32=blow)))))))))))))
                (NUC (AUX-TNS 33=was) (A 34=enough)))
              (CORE
                (CLM 35=to)
                (NUC (NUC (V 36=make)) (NUC (V 38=pour) (ADV 39=forth)))
                (NP (PRO 37=him))
                (NP
                  (OP-DEF 40=a)
                  (CORE_N
                    (NUC_N (N 41=confession))
                    (PP
                      (P 42=of)
                      (NP
                        (CORE_N
                          (AP-PERI (CORE_A (NUC_A (A 43=real))))
                          (AP-PERI (CLM 44=and) (CORE_A (NUC_A (A 45=imaginary))))
                          (NUC_N (N 46=crimes))))))))))))))
  (. 47=.))