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 Input:
Paragraph- Sent 1: Heat supplies the energy that causes motion.
Sent 2: The deeper you go into toward the Earths core, the hotter it gets.
Sent 3: At the core it is really hot.
Sent 4: All that heat tries to rise toward the surface.
Sent 5: In the Mantle, the rock is partially melted and is able to move.
Sent 6: As it is heated, the material in the mantle moves toward the surface.
Sent 7: As the mantle material rises, it cools.
Sent 8: When it reaches the Earths crust, it is mostly stopped.
Sent 9: A little of the material can break through the surface, but not all.
Sent 10: Instead, it begins to move horizontally.
Sent 11: The mantle material moves horizontally away from a mid-ocean ridge crest.
Sent 12: Toward the surface, the mantle material starts to cool.
Sent 13: As it cools it sinks back down into the mantle.
Sent 14: These areas are where deep sea trench occur.
Sent 15: The material sinks back down to the core.
Sent 16: The system operates like a giant conveyor belt.
Sent 17: The motion due to heating and cooling is called convection.
Question: Does rock move more at the surface of the earth or at its core?.

Ex Output:
At its core because it has more heat.

Ex Input:
Paragraph- Sent 1: Alien Planet starts out with an interstellar spacecraft named Von Braun , leaving Earth's orbit .
Sent 2: Traveling at 20 % the speed of light , it reaches Darwin IV in 42 years .
Sent 3: Upon reaching orbit , it deploys the Darwin Reconnaissance Orbiter , Which looks for potential landing sites for the probes .
Sent 4: The first probe , Balboa , explodes along with its lifting body transport during entry , because one of its wings failed to unfold .
Sent 5: Two backup probes , Leonardo da Vinci and Isaac Newton , successfully land on the planet , and learn much about its bizarre indigenous lifeforms , including an apparently sapient species .
Sent 6: The robotic probes sent out to research on Darwin IV are called Horus Probes .
Sent 7: Each Horus probe consists of an { { convert } } long inflatable , hydrogen-filled balloon , Which is covered with solar receptors , a computer ' brain ' , a ' head ' covered with sensors , and several smaller robots that can be sent to places too dangerous for the probes themselves .
Sent 8: The probes have a limited degree of artificial intelligence , very similar to the ' processing power ' of a 4-year-old .
Sent 9: All the real thinking is done by a supercomputer in the orbiting Von Braun .
Sent 10: The probes are programmed with different personalities ; Ike is more cautious , while Leo is the risk-taker .
Sent 11: The two probes are also equipped with a holographic message that will be projected to any sentient life found on Darwin .
Sent 12: After the two probes inflate their gas-bags , they encounter a voracious Arrowtongue and watch it pursue a Gyrosprinter .
Question: Which interstellar spacecraft reaches Darwin IV in 42 years?.

Ex Output:
Von Braun.

Ex Input:
Paragraph- Sent 1: Joe's parents are farmers and they have a huge farm with cows, chickens, and ducks.
Sent 2: Joe loves the farm and all the things he gets to play around and play on.
Sent 3: One day, Joe's father told him not to get near a tractor that was sitting in the field.
Sent 4: His father was worried that Joe would climb on it and hurt himself.
Sent 5: Joe went out to the field and was feeding the horses and cows.
Sent 6: When he was done, he saw the tractor his father told him not to get near.
Sent 7: He knew that climbing on the tractor wouldn't hurt anything, so he did.
Sent 8: He climbed on to the seat and sat there.
Sent 9: Then, he pretended he was his father and pretended that he was driving the tractor.
Sent 10: Joe's father saw him playing on the tractor and called for him.
Sent 11: Joe heard his father calling for him and got off the tractor really fast.
Sent 12: When he did that, he fell off and hurt his arm.
Sent 13: Joe was in pain and his father came running to check on him and picked him up and sat him on a bench and asked him why he did that.
Sent 14: Joe looked at his father and said, "I wanted to be like you."Sent 15: Joe's father gave him a hug and asked him if he wanted to ride with him on the tractor.
Sent 16: Joe did and after he got a bandage on his arm, he and his father rode in the field on the tractor.
Question: Which animals was Joe not feeding.

Ex Output:
Chickens and ducks.