Complex sentence: After Fekir scored his second goal in the 84th minute, he took off his shirt and brandished his name and number to the Saint-Étienne supporters, who threw objects and spilled onto the field, outraged by the gesture.
Split into simpler sentences: After Fekir scored his second goal in the 84th minute, he took off his shirt and brandished its name and number to the Saint-Étienne supporters. Shortly afterwards Saint-Etienne supporters threw objects and spilled onto the field, outraged by the gesture.