RRGbank

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.

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Supertags

	token	arc	supertag
1	The	2	(NP* (OP-DEF <>))
2	union	4	(NP (CORE_N (NUC_N (N <>))))
3	also	4	(CORE* (ADVP-PERI (CORE_ADV (NUC_ADV (ADV <>)))))
4	ceded	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (V <>)) (NP ))))
5	the	8	(CORE_N* (OP-DEF <>))
6	2	7	(CORE_N* (QP (CORE_Q (NUC_Q (QNT <>)))))
7	%	8	(CORE_N* (NP-PERI (CORE_N (NUC_N (N <>)))))
8	commission	4	(NP (CORE_N (NUC_N (N <>))))
9	it	11	(NP (PRO <>))
10	had	11	(CORE* (OP-TNS <>))
11	received	8	(NUC_N* (CLAUSE-PERI (CORE (NP ) (NUC (V <>)) (PP (P ) (NP )))))
12	on	11	(P <>)
13	all	16	(NP* (OP-DEF <>))
14	Pemex	16	(NUC_N* (N-PROP <>))
15	maintenance	16	(NUC_N* (N <>))
16	contracts	11	(NP (CORE_N (NUC_N (N <>))))
17	.	4	(CORE* (. <>))