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	Among	0	(SENTENCE (PrDP (PP (CORE_P (NUC_P (P <>)) (NP )))))
2	possible	3	(CORE_N* (AP-PERI (CORE_A (NUC_A (A <>)))))
3	buyers	1	(NP (CORE_N (NUC_N (N <>))))
4	,	9	(CORE* (, <>))
5	Grand	7	(NUC_N* (N-PROP <>))
6	Metropolitan	7	(NUC_N* (N-PROP <>))
7	PLC	9	(NP (CORE_N (NUC_N (N-PROP <>))))
8	might	9	(CORE* (OP-MOD <>))
9	find	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (V <>)) (NP ) (NP ))))
10	Beefeater	9	(NP (CORE_N (NUC_N (N-PROP <>))))
11	a	13	(NP* (OP-DEF <>))
12	useful	13	(CORE_N* (AP-PERI (CORE_A (NUC_A (A <>)))))
13	addition	9	(NP (CORE_N (NUC_N (N <>)) (PP )))
14	to	13	(PP (P <>) (NP ))
15	its	16	(NP* (OP-DEF <>))
16	portfolio	14	(NP (CORE_N (NUC_N (N <>))))
17	.	9	(CORE* (. <>))