IN:
Multi-choice problem: [he]

Derrick begged his boss for a raise but he did not give one.

OUT:
his boss

IN:
Multi-choice problem: [they]

When the preschoolers visited the senior citizens, they were surprisingly well behaved.

OUT:
the preschoolers

IN:
Multi-choice problem: [he]

A policeman saw John Edwards commit the crime, so he was arrested.

OUT:
John Edwards

IN:
Multi-choice problem: [he]

John flicked Bill because he had a fly on his shirt.

OUT:
Bill