question:
This in part led to a widening of the market, not only allowing to cater to more niche markets, but it also became customary for artists to make AC-friendly singles.
The resurgence of traditional pop was one of the factors that led to what change in the music market?

answer: yes

question:
The name Porter was first used in 1721 to describe a dark brown beer popular with the street and river porters of London.
In what year was the name stout first used to describe a dark beer?

answer: no

question:
VISPs resemble mobile virtual network operators and competitive local exchange carriers for voice communications.
What is a VISP?

answer: no

question:
The human body contains copper at a level of about 1.4 to 2.1 mg per kg of body mass.
What is the level of copper in the human body?

answer:
yes