He used to live in that town, and he still knows all the streets by heart.

I can't come to your wedding because it clashes with a friend's funeral.

Two landmarks are of particular importance to the surgeon: (1) The palpable rather than visible intersphincteric groove, which defines the plane separating the involuntary internal sphincter from the voluntary external sphincter, and (2) the dentate line, which is defined by the columns of Morgani.

He appears to be in the know about such matters.