_Something followed by B is A_-- would be clumsy formalism.

We usually say, and we ought to say-- _A is followed by B_ .'.

_B follows A_ (or _is preceded by A_).
Now, any relation between two terms may be viewed from either side--_A: B_ or _B: A_.

It is in both cases the same fact; but, with the altered point of view, it may present a different character.

For example, in the Immediate Inference--_A > B_ .'.