Problem: Does "The total number of Greeks living outside Greece and Cyprus today is a contentious issue." answer the question "At what university is this issue of accurate consensus for Greeks living elsewhere being debated an"

A: no

Problem: Does "There's a barrel on the background of the image of the left which can be used as a scale to represent the size of the mechanism" answer the question "What is on the background of the image which can be used as a scale to represent the size of the mechanism?"

A: yes

Problem: Does "Machining of copper is possible, although it is usually necessary to use an alloy for intricate parts to get good machinability characteristics." answer the question "What percentage of copper is used in roofing and plumbing?"

A:
no