Problem: Does "In parts of the world that used 50 Hz current, the standard was 77.92 rpm (3,000 rpm with a 77:2 ratio), which was also the speed at which a strobe disc with 77 lines would "stand still" in 50 Hz light (92 lines for 60 Hz)." answer the question "In what year was 78.26 rpm chosen as standard?"

A: no

Problem: Does "Greenhouses remain an important part of horticulture today, and plastic transparent materials have also been used to similar effect in polytunnels and row covers." answer the question "What was one of the first uses of a greenhouse?"

A: no

Problem: Does "Leon Battista Alberti, who elaborates on the ideas of Vitruvius in his treatise, De Re Aedificatoria, saw beauty primarily as a matter of proportion, although ornament also played a part." answer the question "Who wrote De Re Aedificatoria?"

A:
yes