Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.

[EX Q]: Paragraph- Sent 1: A group of researchers at a remote jungle island outpost discover the natives are practicing voodoo and black magic .
Sent 2: After killing the local priest , a voodoo curse begins to raise the dead to feed on the living in retribution .
Sent 3: The researchers on the island are killed by the newly risen zombies , except for Jenny , the daughter of a scientist couple .
Sent 4: She escapes , protected by an enchanted necklace charm given to her by her mother shortly before her death .
Sent 5: She returns years later as an adult with a group of mercenaries to attempt to uncover what happened to her parents .
Sent 6: Shortly after arriving at the island their boat 's engine dies , stranding them .
Sent 7: Meanwhile elsewhere on the island a trio of hikers discover a cave , the same cave leading to the underground temple where the original curse was created .
Sent 8: After accidentally reviving the curse , the dead once again return to kill any who trespass on their island .
Sent 9: The mercenaries encounter their first zombie , who injures a member of the team .
Sent 10: Taking shelter in the remains of the old research facilities medical quarters they are soon joined by Chuck , the only surviving hiker .
Sent 11: Arming themselves with weapons left behind by the long dead research team , they make their stand as the dead once again rise .
Sent 12: One by one they are injured or killed , one of whom sacrifices himself to blow up the medical facility and his newly undead team members .
Sent 13: Jenny and Chuck flee , the only survivors remaining .
Sent 14: They stumble upon the cave once again , where the zombies appear and attack . 
Question: Who returns to the island with a group of mercenaries?.
[EX A]: Jenny.

[EX Q]: Paragraph- Sent 1: You know that friction also causes heat.
Sent 2: Think about when you rub your hands together.
Sent 3: It is friction that makes them warm.
Sent 4: But why does this happen?
Sent 5: Friction causes the molecules on rubbing surfaces to move faster.
Sent 6: Faster moving particles have more heat energy.
Sent 7: Heat from friction can be useful.
Sent 8: Can you think of other places where you might find friction?
Sent 9: Friction also lets you light a match.
Sent 10: Heat from friction can also cause problems.
Sent 11: It can cause a car to overheat.
Sent 12: To reduce friction, oil is added to the engine.
Sent 13: Oil coats the surfaces of moving parts.
Sent 14: This coating of oil makes them slippery.
Sent 15: When things are slippery there is less friction.
Sent 16: Have you ever seen a sign that says, slippery when wet?
Sent 17: This too has to do with friction.
Sent 18: Water, like oil, can reduce friction.
Sent 19: The wet surface may allow your shoes to slide more easily. 
Question: What would happen if all the oil leaked out of a running car engine?.
[EX A]: It would overheat.

[EX Q]: Paragraph- Sent 1: When you get sick, your body springs to action.
Sent 2: Your body starts to fight the illness.
Sent 3: Thats why you want to eat right and get plenty of sleep.
Sent 4: You need a strong immune system to fight off illness.
Sent 5: Plants dont have an immune system.
Sent 6: That does not mean they do not get sick.
Sent 7: Plants are affected by disease just like us.
Sent 8: Typically, their first line of defense is the death of part of the plant.
Sent 9: This prevents the infection from spreading.
Sent 10: Many plants also produce special chemicals to fight disease.
Sent 11: For example, willow trees produce a chemical to kill the bacteria.
Sent 12: The same compound is used in many acne products.
Sent 13: You can see a picture of a willow tree in Figure Plants may be smarter than we think.
Sent 14: No, they cannot talk to each other.
Sent 15: They may be able to send messages, though. 
Question: What do humans have that plants don't have?.
[EX A]:
Immune systems.

