The critical part of the Sep 02 post on the ‘stranding prepositions‘

Post #2

As stated in the Wikipedia, someone also sent a question here and disagrees with the content of the Sep 02 post as to the principles of government and binding for this example and explanation provided in WP (see also here the full version)--

Stranded prepositions can also arise in passive voice constructions and other uses of passive past participial phrases, where the complement in a prepositional phrase can become zero in the same way that a verb's direct object would: it was looked at; I will be operated on; get your teeth seen to. The same can happen in certain uses of infinitive phrases: he is nice to talk to. 

An infinitive phrase of the adjectival complement.