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	What	5	(NP-WH (PRO-WH <>))
2	is	5	(CLAUSE (CORE (CORE (NUC (V <>)) (NP )) (CORE )))
3	one	2	(NP (PRO <>))
4	to	5	(CORE* (CLM <>))
5	think	0	(SENTENCE (CLAUSE (PrCS (NP-WH )) (CORE#WRAP# (NUC (V <>)) (PP ))))
6	of	5	(PP (P <>) (NP ))
7	all	8	(NP* (QP-PERI (CORE_Q (NUC_Q (QNT <>)))))
8	this	6	(NP (PRO-DEM <>))
9	?	0	(SENTENCE (. <>))