What is a call

[xbumpire]

I meet a question as I check the foul ball term.Let us assume a play:Batter Hit a pop up near the on-deck circle.the 1st baseman and catcher chase the fly ball,the ball first touch the mitt of the catcher,bounce out mitt in air,then 1st baseman catch the ball before it land the dirt.shoul I call a "catch" batter is out.
And what about if the pop up fly ball touch the shouder of the catcher then catch by the 1st baseman?
How to understand the foul ball term "......or that, while on or over foul territory, touches the person of an umpire or player, or any object foreign to the natural ground. ......."