Q: Yes / no, is the following a verifiable fact?
"There have been several movies based on Zorro that have been released."
A: yes
How to explain the answer: Zorro is a cinematic character that has many of movies made about.

Q: Is the following sentence factually correct?
"Zheng Jie plays tennis, and is one of China's most successful players of all time."
Options:
- yes
- no
A: yes
How to explain the answer: Zheng Jie's major claim to fame is the number of titles and awards she has won playing tennis for China.

Q: "The American black bear became the largest mammal on earth."
Is the above claim true?
Options:
- yes
- no
A: no
How to explain the answer: The Blue whale is the largest mammal on earth.