Complex sentence: In this scene, set in Hell's Kitchen, New York in the early 1920s, he is working as a car mechanic, he is noticed by Peter Clemenza, who has been calling him "Johnny Lips".
Split into simpler sentences: In this scene, set in Hell's Kitchen, New York in the early 1920s, he is working as a car mechanic. He is noticed by Peter Clemenza, who has been calling him "Johnny Lips".