QUES:
Who is he in the following sentence?

Jack pushed John up the hill because he was in a wheelbarrow.

ANS:
John

QUES:
Who is they in the following sentence?

Space Marines are played more often than Orks, but they are noticed more often at tournaments due to their uniqueness.

ANS:
Orks

QUES:
Who is her in the following sentence?

Mary stabbed Jennifer, so John took her to the hospital.

ANS:
Jennifer