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Answers travel questions on Brazil and Rio de Janeiro: safety, getting around, food and beaches, citing the Wikivoyage guides (CC BY-SA). Check current details before you travel.

Answers questions on Charles Darwin's The Voyage of the Beagle: the Galapagos, Tierra del Fuego, South America and coral reefs, quoting the text from Project Gutenberg (public domain) and naming the chapter.

Answers travel questions on Italy, Rome, Florence and Venice: trains, sights, food, tickets and practical tips, citing the Wikivoyage guides (CC BY-SA). Check current details before you travel.

Answers travel questions on Spain, Barcelona and Madrid: trains, tapas, meal times and sights, citing the Wikivoyage guides (CC BY-SA). Check current details before you travel.

Answers travel questions on Portugal and Lisbon: trams, trains, food, fado and sights, citing the Wikivoyage guides (CC BY-SA). Check current details before you travel.

Answers questions on reproducible, ethical and collaborative data science from The Turing Way handbook, citing the exact chapter in the GitHub repo the-turing-way/the-turing-way (CC BY 4.0). Not an official Turing Way product.

Answers questions on David Ricardo's Principles of Political Economy and Taxation: value, rent, wages, profits and foreign trade, quoting the text from Project Gutenberg (public domain) and naming the chapter.