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=She))
      (NUC (V 2=had))
      (NP
        (OP-DEF 3=her)
        (CORE_N (QP-PERI (CORE_Q (NUC_Q (QNT 4=first)))) (NUC_N (N 5=love-affair))))
      (CLAUSE-PERI
        (CLM 6=when)
        (CORE
          (NP (PRO 7=she))
          (NUC (AUX-TNS 8=was) (NP (CORE_N (NUC_Q (QNT 9=sixteen)))))))
      (PP-PERI
        (, 10=,)
        (CORE_P
          (NUC_P (P 11=with))
          (NP
            (OP-DEF 12=a)
            (CORE_N
              (NUC_N (N-PROP 13=Party) (N 14=member))
              (PP-PERI
                (CORE_P
                  (NUC_P (P 15=of))
                  (NP (CORE_N (NUC_Q (QNT 16=sixty)))))))
            (SENTENCE-PERI
              (CLAUSE
                (PrCS (NP-REL (PRO-REL 17=who)))
                (CORE
                  (CORE
                    (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 18=later))))
                    (NUC (V 19=committed))
                    (NP (CORE_N (NUC_N (N 20=suicide)))))
                  (CORE
                    (CLM 21=to)
                    (NUC (V 22=avoid))
                    (NP (CORE_N (NUC_N (N 23=arrest))))))))))))
    (OP-TNS 1=had)
    (. 24=.)))