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 0=They))
      (NUC (V 1=remembered))
      (NP
        (CORE_N
          (QP-PERI (OP-DEF 2=a) (CORE_Q (NUC_Q (QNT 3=million))))
          (AP-PERI (CORE_A (NUC_A (A 4=useless))))
          (NUC_N (N 5=things)))
        (NP-PERI
          (, 6=,)
          (NP
            (OP-DEF 7=a)
            (CORE_N
              (NUC_N (N 8=quarrel))
              (PP (P 9=with) (NP (OP-DEF 10=a) (CORE_N (NUC_N (N 11=workmate))))))
            (, 12=,))
          (NP
            (OP-DEF 13=a)
            (CORE_N
              (NUC_N (N 14=hunt))
              (PP
                (P 15=for)
                (NP
                  (OP-DEF 16=a)
                  (CORE_N
                    (AP-PERI (CORE_A (NUC_A (V-PART 17=lost))))
                    (NUC_N (N 18=bicycle) (N 19=pump))))))
            (, 20=,))
          (NP
            (OP-DEF 21=the)
            (CORE_N
              (NUC_N (N 22=expression))
              (PP-PERI
                (CORE_P
                  (NUC_P (P 23=on))
                  (NP
                    (NPIP
                      (NP
                        (OP-DEF 24=a)
                        (CORE_N
                          (AP-PERI (CORE_A (NUC_A (A 25=long-dead))))
                          (NUC_N (N 26=sister)))
                        (POS 27='s)))
                    (CORE_N (NUC_N (N 28=face)))))))
            (, 29=,))
          (NP
            (OP-DEF 30=the)
            (CORE_N
              (NUC_N (N 31=swirls))
              (PP (P 32=of) (NP (CORE_N (NUC_N (N 33=dust)))))
              (PP-PERI
                (CORE_P
                  (NUC_P (P 34=on))
                  (NP
                    (OP-DEF 35=a)
                    (CORE_N
                      (AP-PERI (CORE_A (NUC_A (A 36=windy))))
                      (NUC_N (N 37=morning))
                      (ADVP-PERI
                        (CORE_ADV
                          (NP
                            (CORE_N
                              (QP (CORE_Q (NUC_Q (QNT 38=seventy))))
                              (NUC_N (N 39=years))))
                          (NUC_ADV (ADV 40=ago)))))))))))))
    (. 41=:))
  (CLAUSE
    (CLM 42=but)
    (CORE
      (NP
        (CORE_N
          (QP-PERI (CORE_Q (NUC_Q (QNT 43=all))))
          (AP-PERI (CORE_A (NUC_A (A 45=relevant))))
          (NUC_N (N 46=facts)))
        (OP-DEF 44=the))
      (NUC
        (AUX-TNS 47=were)
        (ADVP
          (CORE_ADV
            (NUC_ADV (ADV 48=outside))
            (NP
              (OP-DEF 49=the)
              (CORE_N
                (NUC_N (N 50=range))
                (PP (P 51=of) (NP (OP-DEF 52=their) (CORE_N (NUC_N (N 53=vision))))))))))))
  (. 54=.))