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.
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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
    (CLAUSE-PERI
      (CLM 0=If)
      (CORE
        (NP (PRO 1=he))
        (OP-MOD 2=could)
        (NUC (V 3=get))
        (NP (PRO 4=her))
        (PP
          (CORE_P
            (NUC_P (P 5=at))
            (NP
              (OP-DEF 6=a)
              (CORE_N
                (NUC_N (N 7=table))
                (PP-PERI (CORE_P (NUC_P (P 8=by)) (NP (PRO 9=herself))) (, 10=,))
                (PP-PERI
                  (CORE_P
                    (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 11=somewhere))))
                    (NUC_P (P 12=in))
                    (NP
                      (OP-DEF 13=the)
                      (CORE_N
                        (NUC_N (N 14=middle))
                        (PP
                          (P 15=of)
                          (NP (OP-DEF 16=the) (CORE_N (NUC_N (N 17=room))))))))
                  (, 18=,))
                (PP-PERI
                  (CORE_P
                    (OP-NEG 19=not)
                    (NUC_P
                      (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 20=too))))
                      (P 21=near))
                    (NP (OP-DEF 22=the) (CORE_N (NUC_N (N 23=telescreens)))))
                  (, 24=,))
                (PP-PERI
                  (CLM 25=and)
                  (CORE_P
                    (NUC_P (P 26=with))
                    (NP
                      (OP-DEF 27=a)
                      (CORE_N
                        (AP-PERI (CORE_A (NUC_A (A 28=sufficient))))
                        (NUC_N (N 29=buzz))
                        (PP
                          (P 30=of)
                          (NP
                            (CORE_N
                              (NUC_N (N 31=conversation))
                              (ADVP-PERI
                                (CORE_ADV
                                  (NUC_ADV (ADV 32=all) (ADV 33=round))))))))))))))))
      (. 34=-))
    (CLAUSE-PERI
      (CLM 35=if)
      (CORE
        (NP (OP-DEF 36=these) (CORE_N (NUC_N (N 37=conditions))))
        (NUC (V 38=endured))
        (PP-PERI
          (CORE_P
            (NUC_P (P 39=for))
            (NP
              (CORE_N (QP (CORE_Q (NUC_Q (QNT 43=thirty)))) (NUC_N (N 44=seconds)))))
          (, 45=,)))
      (ADVP-PERI (, 40=,) (CORE_ADV (NUC_ADV (ADV 41=say))) (, 42=,)))
    (CORE
      (CORE (NP (PRO 46=it)) (OP-MOD 47=might) (NUC (AUX 48=be) (A 49=possible)))
      (CORE
        (CLM 50=to)
        (NUC (V 51=exchange))
        (NP
          (CORE_N
            (QP-PERI (CORE_Q (NUC_Q (OP-DEF 52=a) (QNT 53=few))))
            (NUC_N (N 54=words)))))))
  (. 55=.))