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	``	6	(SENTENCE* (`` <>))
2	What	4	(NP-WH (PRO-WH <>))
3	this	4	(NP (PRO-DEM <>))
4	tells	6	(CLAUSE (PrCS (NP-WH )) (CORE (NP ) (NUC (V <>)) (NP )))
5	us	4	(NP (PRO <>))
6	is	0	(SENTENCE (CLAUSE (CORE (CLAUSE ) (NUC (V <>)))))
7	that	12	(CLAUSE* (CLM <>))
8	U.S.	10	(NUC_N* (N-PROP <>))
9	trade	10	(NUC_N* (N <>))
10	law	12	(NP (CORE_N (NUC_N (N <>))))
11	is	12	(CORE* (OP-TNS <>))
12	working	6	(CORE* (CLAUSE (CORE (NP ) (NUC (V <>)))))
13	,	6	(SENTENCE* (, <>))
14	''	6	(SENTENCE* ('' <>))
15	he	16	(NP (PRO <>))
16	said	0	(SENTENCE (SENTENCE ) (CLAUSE (CORE (NP ) (NUC (V <>)))))
17	.	0	(SENTENCE (. <>))