Here is a question about this article: In 1925, 78.26 rpm was chosen as the standard because of the introduction of the electrically powered synchronous turntable motor. This motor ran at 3600 rpm, such that a 46:1 gear ratio would produce 78.26 rpm. 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). After World War II these records were retroactively known as 78s, to distinguish them from other newer disc record formats. Earlier they were just called records, or when there was a need to distinguish them from cylinders, disc records.
What is the answer to this question: Why are these records known as '78s'?
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So... to distinguish them from other newer disc record formats

Here is a question about this article: I Love New York (stylized I ❤️ NY) is both a logo and a song that are the basis of an advertising campaign and have been used since 1977 to promote tourism in New York City, and later to promote New York State as well. The trademarked logo, owned by New York State Empire State Development, appears in souvenir shops and brochures throughout the city and state, some licensed, many not. The song is the state song of New York.
What is the answer to this question: When was I ❤️ NY first used in advertisements?
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So... 1977

Here is a question about this article: Despite the fact that humans have occupied the territory of Portugal for thousands of years, something still remains of the original vegetation. In Geres both deciduous and coniferous forests can be found, an extremely rare worldwide mature mediterranean forest remain in some parts of the Arrabida mountain and a subtropical laurissilva forest, dating back to the Tertiary period, covers its largest continuous area in the world in the Madeira main island. Due to the human population decrease and rural exodus, Pyrenean oak and other local native trees are colonizing many abandoned areas. Boar, Iberian red deer, roe deer, Iberian wild goat, for example, are reported to be expanding greatly, during the last decades. Boars were found recently roaming at night inside large urban areas, like in Setubal. Protected areas of Portugal include one national park (Portuguese: Parque Nacional), 12 natural parks (Portuguese: Parque Natural), nine natural reserves (Portuguese: Reserva Natural), five natural monuments (Portuguese: Monumento Natural), and seven protected landscapes (Portuguese: Paisagem Protegida), which include the Parque Nacional da Peneda-Geres, the Parque Natural da Serra da Estrela and the Paul d'Arzila.
What is the answer to this question: How many national parks does Portugal have?
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So...
12