Q: Does "Newly electrified lines often show a "sparks effect", whereby electrification in passenger rail systems leads to significant jumps in patronage / revenue." provide a valid answer to "What can be seen in the newly electrified lines?"?
A: yes

Q: Does "Originally, Canada was thought to have had the third-largest navy in the world, but with the fall of the Soviet Union, new data based on Japanese and Soviet sources found that to be incorrect." provide a valid answer to "Which other country had a sizable naval army?"?
A: yes

Q: Does "Schoppa, the editor of The Columbia Guide to Modern Chinese History argues, "A date around 1780 as the beginning of modern China is thus closer to what we know today as historical 'reality'." provide a valid answer to "What were the Manchus originally named?"?
A: no

Q: Does "The central part of the Sahara is hyperarid, with little to no vegetation." provide a valid answer to "How often does the Sahara go without rainfall?"?
A:
no