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=He))
      (OP-NEG 2=not)
      (NUC (V 3=suppose))
      (PP-PERI
        (, 4=,)
        (CORE_P
          (NUC_P (P 5=from))
          (CLAUSE
            (PrCS (NP-WH (PRO-WH 6=what)))
            (CORE
              (NP (PRO 7=he))
              (OP-MOD 8=could)
              (NUC (V 9=remember))
              (PP (CORE_P (NUC_P (P 10=of)) (NP (PRO 11=her)))))))
        (, 12=,)))
    (OP-TNS 1=did)
    (CLAUSE
      (CLM 13=that)
      (CORE
        (NP (PRO 14=she))
        (NUC
          (AUX-ASP 16=been)
          (NP
            (OP-DEF 17=an)
            (CORE_N (AP-PERI (CORE_A (NUC_A (A 18=unusual)))) (NUC_N (N 19=woman)))
            (NP-PERI
              (, 20=,)
              (CORE_N
                (ADVP-PERI
                  (CORE_ADV
                    (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 21=still))))
                    (NUC_ADV (ADV 22=less))))
                (AP-PERI (CORE_A (NUC_A (A 24=intelligent))))
                (NUC_N (N 25=one)))
              (OP-DEF 23=an)))))
      (OP-TNS 15=had))
    (. 26=;))
  (CLAUSE
    (CLM 27=and)
    (CLM 28=yet)
    (CORE
      (NP (PRO 29=she))
      (NUC (V 31=possessed))
      (NP
        (NP
          (NP (OP-DEF 32=a))
          (CORE_N
            (NUC_N (N 33=kind))
            (PP (P 34=of) (NP (CORE_N (NUC_N (N 35=nobility))))))
          (, 36=,))
        (NP
          (OP-DEF 37=a)
          (CORE_N
            (NUC_N (N 38=kind))
            (PP (P 39=of) (NP (CORE_N (NUC_N (N 40=purity)))))))))
    (OP-TNS 30=had)
    (CLAUSE-PERI
      (, 41=,)
      (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 42=simply))))
      (CLM 43=because)
      (CORE
        (NP
          (OP-DEF 44=the)
          (CORE_N
            (NUC_N
              (N 45=standards)
              (CLAUSE-PERI
                (PrCS (NP-REL (PRO-REL 46=that)))
                (CORE (NP (PRO 47=she)) (NUC (V 48=obeyed)))))))
        (NUC
          (AUX-TNS 49=were)
          (NP
            (CORE_N (AP-PERI (CORE_A (NUC_A (A 50=private)))) (NUC_N (N 51=ones))))))))
  (. 52=.))