Spatial and Temporal Properties of Vehicle and Content

Of most interest to me, the spatial and temporal properties of the vehicle and content need not be the same with language:

E.g., [Getting away from the tiger situation]

(a) The vehicle of the sentence ‘Caesar crosses the Rubicon’ can fit on the head of a pin; it exists in 2014.

(b) The content of the sentence ‘Caesar crosses the Rubicon’ cannot fit on the head of a pin; it cannot exist in 2014.