[…] (51) he decided on the boat on the train; that is, "he chose the boat while on the train". Clearly, the second Prepositional-Phrase in (51) is simply a Place Adverbial, which, like a Time Adverbial, has no particular connection with the Verb, but in fact modifies the entire Verb Phrase or perhaps the entire sentence. It can, in fact, be optionally preposed to the sentence, although the first Prepositional-Phrase of (51), which is in close construction with the Verb, cannot - that is, the sentence "on the train, he decides" is unambiguous.
- Chomsky (1969), a pag.101