In their syntax, the TRAJECTOR is external to the prepositional phrase and the LANDMARK fills the role of the object of the preposition. In the example sentence The earth traveled around the sun, the preposition is around, the object of the preposition is the sun, and the entire prepositional phrase is around the sun. Note that the LANDMARK is always the object of the preposition, here the sun, whereas the TRAJECTOR may fill any number of roles in the sentence. In I washed the dirt from my hand,