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.
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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
        (OP-DEF 0=Any)
        (CORE_N
          (NUC_N
            (N 1=sound)
            (CLAUSE-PERI
              (PrCS
                (NP-REL (PRO-REL 2=that))
                (CORE (NP (CORE_N (NUC_N (N-PROP 3=Winston)))) (NUC (V 4=made))))))
          (PP-PERI
            (, 5=,)
            (CORE_P
              (NUC_P (P 6=above))
              (NP
                (OP-DEF 7=the)
                (CORE_N
                  (NUC_N (N 8=level))
                  (PP
                    (CORE_P
                      (NUC_P (P 9=of))
                      (NP
                        (OP-DEF 10=a)
                        (CORE_N
                          (AP-PERI
                            (CORE_A
                              (NUC_A
                                (ADVP-PERI
                                  (CORE_ADV (NUC_ADV (ADV 11=very))))
                                (A 12=low))))
                          (NUC_N (N 13=whisper)))))))))
            (, 14=,))))
      (OP-MOD 15=would)
      (NUC (AUX 16=be) (V 17=picked) (PRT 18=up))
      (PP (P 19=by) (NP (PRO 20=it)))))
  (CLAUSE
    (ADVP-PERI (, 21=,) (CORE_ADV (NUC_ADV (ADV 22=moreover))) (, 23=,))
    (CLAUSE
      (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 24=so) (ADV 25=long) (CLM 26=as))))
      (CORE
        (NP (PRO 27=he))
        (NUC (V 28=remained))
        (PP
          (CORE_P
            (NUC_P (P 29=within))
            (NP
              (OP-DEF 30=the)
              (CORE_N
                (NUC_N
                  (N 31=field)
                  (CLAUSE-PERI
                    (PrCS (NP-REL (PRO-REL 34=which)))
                    (CORE
                      (NP
                        (OP-DEF 35=the)
                        (CORE_N
                          (AP-PERI (CORE_A (NUC_A (A 36=metal))))
                          (NUC_N (N 37=plaque))))
                      (NUC (V 38=commanded)))))
                (PP (P 32=of) (NP (CORE_N (NUC_N (N 33=vision)))))))))))
    (CLAUSE
      (, 39=,)
      (CORE
        (NP (PRO 40=he))
        (OP-MOD 41=could)
        (NUC
          (NUC (AUX 42=be) (V 43=seen))
          (NUC
            (ADVP-PERI (CORE_ADV (NUC_ADV (P 44=as) (ADV 45=well) (P 46=as))))
            (V 47=heard))))))
  (. 48=.))