QUES: Q: Which one of one's father's surnames is used?
A: The law contemplates the possibility of joining both surnames with the Catalan conjunction i ("and").
Does the answer answer the question?

ANS: no

QUES: Q: What is the maximum premissible current density in open air of copper?
A: The maximum permissible current density of copper in open air is approximately 3.1106 A/m2 of cross-sectional area, above which it begins to heat excessively.
Does the answer answer the question?

ANS: yes

QUES: Q: Other than the drastic decrease in population, what other issue did the people in Seoul face?
A: This was the city's fourth conquest in a years' time, leaving it a ruin; the 1.5 million pre-war population was down to 200,000, and people were suffering from severe food shortages.
Does the answer answer the question?

ANS: yes

QUES: Q: What is the name of the first tropical aquarium in Germany?
A: Some points of interest are the Tropical House, the Cactus House, the Canary House and the Orchid House, which hosts one of the world's biggest collection of orchids, and free-flying birds and butterflies.
Does the answer answer the question?

ANS:
no