Q: Is the following sentence factually correct?
"Porpoises design highly efficient catapult systems."
Options:
- yes
- no
A: no
How to explain the answer: Porpoises are simple mammals who do not make human technology.

Q: Is the following statement true?
"The novel The Hitchhiker's Guide to the Galaxy spawned a number of sequels."
A: yes
How to explain the answer: The Hitchhiker's Guide to the Galaxy and its four follow-up novels are famous among sci-fi comedy lovers.

Q: Does the following sentence make sense?
"Mars Exploration Rover has returned to earth with core samples."
Options:
- yes
- no
A: no
How to explain the answer: Mars Exploration Rover is still on Mars and is inoperable.