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	Why	6	(ADVP-WH (ADV-WH <>))
2	does	6	(CLAUSE* (OP-TNS <>))
3	n't	6	(CORE* (OP-NEG <>))
4	he	6	(NP (PRO <>))
5	just	6	(CORE* (ADVP-PERI (CORE_ADV (NUC_ADV (ADV <>)))))
6	follow	0	(SENTENCE (CLAUSE (PrCS (ADVP-WH )) (CORE (NP ) (NUC (V <>) (PRT )) (PP ))))
7	through	6	(PRT <>)
8	on	6	(PP (CORE_P (NUC_P (P <>)) (NP )))
9	one	8	(NP (CORE_N (NUC_Q (QNT <>)) (PP )))
10	of	9	(PP (P <>) (NP ))
11	these	12	(NP* (OP-DEF <>))
12	things	10	(NP (CORE_N (NUC_N (N <>))))
13	?	0	(SENTENCE (. <>))
14	''	0	(SENTENCE ('' <>))