spuARB

In general, we attach post-clausal modifiers at the VP node, as you typically get scope ambiguity effects with negation (John didn't leave today - did he leave or not?). However, with post-sentential, comma-separated adverbs, there is no ambiguity - in John didn't leave, today he definitely did not leave. Since this tree is only selected by a subset of the adverbs (namely, those which can appear pre-sententially, without a punctuation mark), it is anchored by the adverb.

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(547)

The names of some of these products don't suggest the risk involved in buying them , either . [WSJ]