1.   A bullet had struck his torso and grazed a lung.

2.   A knife penetrated his stomach, grazing his lungs, and put his sporting career in doubt.

3.   He had difficulty breathing because a bullet grazed his lungs in the attack.

4.   Popov was stabbed with a knife that penetrated his stomach, grazing his lungs.

5.   He was stabbed with a knife that penetrated his stomach, grazing his lungs.