CoT: Purple is made from red and blue, not yellow and blue.
Answer: no
What is the question? This is the question: Is the following statement true?
"Purple develops from mixing yellow and blue together."

CoT: This is false and can be checked with web research.
Answer: no
What is the question? This is the question: Does the following sentence make sense?
"Pythagoras wrote the Twilight Saga at the age of 19."
Options:
- yes
- no

CoT: This is front and center within the play.
Answer: yes
What is the question? This is the question: Is the following a factual statement?
"The play Twelfth Night heavily features mistaken identities and people in disguise."
Options:
- yes
- no

CoT: Chevron has suffered major oil spills in Angola and off the coast of Rio de Janeiro.
Answer: no

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
What is the question? This is the question: Is the following a factual statement?
"The Chevron Corporation boasts proudly of its history being unsullied by any oil spills."
Options:
- yes
- no