IN:
Multi-choice problem: [he]

Bumblebee was sent home with Sam Witwicky to protect him so he is on watch 7 days a week.

OUT:
Sam Witwicky

IN:
Multi-choice problem: [he]

Obama had a meeting with Cantor, where he attempted to secure his support of the jobs bill.

OUT:
Obama

IN:
Multi-choice problem: [she]

The artist told the model that she needed to stand up straighter.

OUT:
the model

IN:
Multi-choice problem: [he]

Bill triumphed over John in the boxing ring because he fought cowardly.

OUT:
John