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
      (PP-PERI
        (CORE_P
          (ADVP-PERI
            (CORE_ADV
              (NUC_ADV
                (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 0=Very))))
                (ADV 1=early))))
          (NUC_P (P 2=in))
          (NP
            (OP-DEF 3=her)
            (CORE_N (AP-PERI (CORE_A (NUC_A (A 4=married)))) (NUC_N (N 5=life))))))
      (NP (PRO 6=he))
      (NUC (V 8=decided)))
    (OP-TNS 7=had)
    (CLAUSE-PERI
      (. 9=-)
      (CLM 10=though)
      (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 11=perhaps))))
      (CORE
        (NP (PRO 12=it))
        (NUC
          (AUX-TNS 13=was)
          (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 14=only))))
          (CLAUSE
            (CLM 15=that)
            (CORE
              (NP (PRO 16=he))
              (NUC (V 17=knew))
              (NP (PRO 18=her))
              (ADVP-PERI
                (CORE_ADV
                  (NUC_ADV
                    (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 19=more))))
                    (ADV 20=intimately))
                  (PP-PERI
                    (CORE_P
                      (NUC_P (P 21=than))
                      (CLAUSE
                        (CORE
                          (NP (PRO 22=he))
                          (NUC (V 23=knew))
                          (NP (OP-DEF 24=most) (CORE_N (NUC_N (N 25=people))))))))))))))
      (. 26=-))
    (CLAUSE
      (CLM 27=that)
      (CORE
        (NP (PRO 28=she))
        (NUC (V 29=had))
        (PP-PERI
          (CORE_P (NUC_P (P 30=without)) (NP (CORE_N (NUC_N (N 31=exception))))))
        (NP
          (OP-DEF 32=the)
          (CORE_N
            (AP-PERI
              (CORE_A
                (NUC_A
                  (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 33=most))))
                  (NUC_A (A 34=stupid) (, 35=,))
                  (NUC_A (A 36=vulgar) (, 37=,))
                  (NUC_A (A 38=empty)))))
            (NUC_N
              (N 39=mind)
              (CLAUSE-PERI
                (PrCS (NP-REL (PRO-REL 40=that)))
                (CORE
                  (NP (PRO 41=he))
                  (ADVP-PERI (CORE_ADV (NUC_ADV (ADV 43=ever))))
                  (NUC (V 44=encountered)))
                (OP-TNS 42=had))))))))
  (. 45=.))