question:
They are used in phase-locked loops, amongst other applications.
What is an application of varactors?

answer: yes

question:
He and his wife Frida Kahlo lived in Coyoacan, where several of their homes, studios, and art collections are open to the public.
How many art galleries are in Mexico City?

answer: no

question:
Following nationalist violence in the 1950s, Cyprus was granted independence in 1960.
What year was Cyprus granted independence?

answer: yes

question:
The handover ceremony in 1997 marked for many, including Charles, Prince of Wales, who was in attendance, "the end of Empire".
Who was the British Prime Minister in 1982?

answer:
no