Does "At present, only a few LEDsextremely bright LEDs that also have a tightly focused viewing angle of 8 or lesscould, in theory, cause temporary blindness, and so are classified as "Class 2"." contain the correct answer to "What does being a Class 1 LED product mean?"
OPTIONS:
- yes
- no

A: no

Does "It has been serving as the capital city of Jiangsu province after the China was established, and is still the nominal capital of Republic of China that accommodates many of its important heritage sites, including the Presidential Palace and Sun Yat-sen Mausoleum." contain the correct answer to "What mausoleum is in Nanjing?"
OPTIONS:
- yes
- no

A: yes

Does "It has since alternated between democratically-elected civilian governments and military dictatorships, until it achieved a stable democracy in 1999, with its 2011 presidential elections being viewed as the first to be conducted reasonably freely and fairly." contain the correct answer to "When did Nigeria have a fair presidential election?"
OPTIONS:
- yes
- no

A:
yes