Who is he?
Conan O'Brien replaced Jay Leno as host of Late Night, however, he was soon asked to come back and have his previous time slot.

OPTIONS:
- Conan O'Brien
- Jay Leno

A:
Jay Leno

Who is they?
A series of injections are used to battle a type of cancer in patients because they have a special type of drug which counteracts this sickness.

OPTIONS:
- A series of injections
- patients

A:
patients

Who is she?
The nurse gave the girl a lollypop because she had too many.

OPTIONS:
- The nurse
- the girl

A:

The nurse