Background: Jose Julian Marti Perez (January 28, 1853 - May 19, 1895) was a Cuban National Hero and an important figure in Latin American literature. During his life, he worked as a poet, essayist, journalist, translator, professor, and publisher. He was very politically active, and is considered an important revolutionary philosopher and political theorist. Through his writings and political activity, he became a symbol of Cuba's bid for independence against Spain in the 19th century, and is referred to as the "Apostle of Cuban Independence."
Context: Jose Marti is usually honored as a great poet, patriot and martyr of Cuban Independence, but he was also a translator of some note. Although he translated literary material for the sheer joy of it, much of the translating he did was imposed on him by economic necessity during his many years of exile in the United States. Marti learned English at an early age, and had begun to translate at thirteen. He continued translating for the rest of his life, including his time as a student in Spain, although the period of his greatest productivity was during his stay in New York from 1880 until he returned to Cuba in 1895. In New York he was what we would call today a "freelancer" as well as an "in house" translator. He translated several books for the publishing house of D. Appleton, and did a series of translations for newspapers. As a revolutionary activist in Cuba's long struggle for independence he translated into English a number of articles and pamphlets supporting that movement. In addition to fluent English, Marti also spoke French, Italian, Latin and Classical Greek fluently, the latter learned so he could read the Greek classical works in the original. There was clearly a dichotomy in Marti's feeling about the kind of work he was translating. Like many professionals, he undertook for money translation tasks which had little intellectual or emotional appeal for him. Although Marti never presented a systematic theory of translation nor did he write extensively about his approach to translation, he did jot down occasional thoughts on the subject, showcasing his awareness of the translator's dilemma of the faithful versus the beautiful and stating that "translation should be natural, so that it appears that the book were written in the language to which it has been translated".
Question: Did he know any other languages?
Answer: he undertook for money translation tasks which had little intellectual or emotional appeal for him.

Problem: Background: Claudius Ptolemy (; Greek: Klaudios Ptolemaios, Klaudios Ptolemaios [klawdios ptoleme:os]; Latin: Claudius Ptolemaeus; c. AD 100 - c. 170) was a Greco-Roman mathematician, astronomer, geographer, astrologer, and poet of a single epigram in the Greek Anthology. He lived in the city of Alexandria in the Roman province of Egypt, wrote in Koine Greek, and held Roman citizenship. The 14th-century astronomer Theodore Meliteniotes gave his birthplace as the prominent Greek city Ptolemais Hermiou
Context: Ptolemy's Almagest is the only surviving comprehensive ancient treatise on astronomy. Babylonian astronomers had developed arithmetical techniques for calculating astronomical phenomena; Greek astronomers such as Hipparchus had produced geometric models for calculating celestial motions. Ptolemy, however, claimed to have derived his geometrical models from selected astronomical observations by his predecessors spanning more than 800 years, though astronomers have for centuries suspected that his models' parameters were adopted independently of observations. Ptolemy presented his astronomical models in convenient tables, which could be used to compute the future or past position of the planets. The Almagest also contains a star catalogue, which is a version of a catalogue created by Hipparchus. Its list of forty-eight constellations is ancestral to the modern system of constellations, but unlike the modern system they did not cover the whole sky (only the sky Hipparchus could see). Across Europe, the Middle East and North Africa in the Medieval period, it was the authoritative text on astronomy, with its author becoming an almost mythical figure, called Ptolemy, King of Alexandria. The Almagest was preserved, like most of extant Classical Greek science, in Arabic manuscripts (hence its familiar name). Because of its reputation, it was widely sought and was translated twice into Latin in the 12th century, once in Sicily and again in Spain. Ptolemy's model, like those of his predecessors, was geocentric and was almost universally accepted until the appearance of simpler heliocentric models during the scientific revolution. His Planetary Hypotheses went beyond the mathematical model of the Almagest to present a physical realization of the universe as a set of nested spheres, in which he used the epicycles of his planetary model to compute the dimensions of the universe. He estimated the Sun was at an average distance of 1,210 Earth radii, while the radius of the sphere of the fixed stars was 20,000 times the radius of the Earth. Ptolemy presented a useful tool for astronomical calculations in his Handy Tables, which tabulated all the data needed to compute the positions of the Sun, Moon and planets, the rising and setting of the stars, and eclipses of the Sun and Moon. Ptolemy's Handy Tables provided the model for later astronomical tables or zijes. In the Phaseis (Risings of the Fixed Stars), Ptolemy gave a parapegma, a star calendar or almanac, based on the hands and disappearances of stars over the course of the solar year.
Question: Did the rulers use his knowledge
Answer:
Ptolemy presented a useful tool for astronomical calculations in his Handy Tables, which tabulated all the data needed to compute the positions of the Sun, Moon and planets,