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$\beta $PUpxPUvx

Tree for pre-VP parenthetical PP, anchored by commas or dashes -
John , in a fit of anger , broke the vase  (463)0(463
Mary , just within the last year , has totalled two cars 

These are clearly not NP modifiers. Figures 23.4 and 23.5 show this tree alone and as part of the parse for ((463)).

Figure: The $\beta $PUpxPUvx tree, anchored by commas

Figure: Tree illustrating the use of $\beta $PUpxPUvx

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