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	In	0	(SENTENCE (PrDP (PP (CORE_P (NUC_P (P <>)) (NP )))))
2	September	1	(NP (CORE_N (NUC_N (N-PROP <>))))
3	1988	2	(CORE_N* (NP-PERI (CORE_N (NUC_Q (QNT <>)))))
4	,	1	(PrDP* (, <>))
5	that	6	(NP* (OP-DEF <>))
6	level	9	(NP (CORE_N (NUC_N (N <>))))
7	was	9	(NUC* (AUX-TNS <>))
8	9.5	9	(CORE_N* (QP (CORE_Q (NUC_Q (QNT <>)))))
9	%	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (NP (CORE_N (NUC_N (N <>))))))))
10	.	9	(CORE* (. <>))