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Tree for pre-VP parenthetical PP, anchored by commas or dashes -
John , in a fit of anger , broke the vase  (515)0(515
Mary , just within the last year , has totalled two cars 

These are clearly not NP modifiers. Figures 24.4 and 24.5 show this tree alone and as part of the parse for ((515)).


{The $\beta$PUpxPUvx tree, anchored by commas



{Tree illustrating the use of $\beta$PUpxPUvx


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