Question: What subject was studied in Mustafa Karim's birthplace?

full_context: Document 1: Haidar Abdul-Jabar: Haidar Abdul-Jabar Kadhim (; born August 25, 1976 in Iraq), known as Haidar Jabar, is an Iraqi football (soccer) defender playing for the Al-Zawra'a SC football club in Iraq.
Document 2: Mustafa Karim: Mustafa Karim Abdullah () (born July 21, 1987) is an Iraqi footballer. He currently plays for Amanat Baghdad. He plays as striker, and is known for his ability to score with both feet.
Document 3: Ancient Near East: The ancient Near East was the home of early civilizations within a region roughly corresponding to the modern Middle East: Mesopotamia (modern Iraq, southeast Turkey, southwest Iran, northeastern Syria and Kuwait), ancient Egypt, ancient Iran (Elam, Media, Parthia and Persia), Anatolia / Asia Minor and Armenian Highlands (Turkey's Eastern Anatolia Region, Armenia, northwestern Iran, southern Georgia, and western Azerbaijan), the Levant (modern Syria, Lebanon, Palestine, Israel, and Jordan), Cyprus and the Arabian Peninsula. The ancient Near East is studied in the fields of Near Eastern archaeology and ancient history.
Document 4: Mustafa Shahin: Mustafa Shahin (born October 8, 1989) is a Lebanese Forward who cerurrently plays for Mohammedan in I-League on loan from Shabab Al-Sahel.
Document 5: Muslim world: The Islamic Golden Age coincided with the Middle Ages in the Muslim world, starting with the rise of Islam and establishment of the first Islamic state in 622. The end of the age is variously given as 1258 with the Mongolian Sack of Baghdad, or 1492 with the completion of the Christian Reconquista of the Emirate of Granada in Al-Andalus, Iberian Peninsula. During the reign of the Abbasid caliph Harun ar-Rashid (786 to 809), the legendary House of Wisdom was inaugurated in Baghdad where scholars from various parts of the world sought to translate and gather all the known world's knowledge into Arabic. The Abbasids were influenced by the Quranic injunctions and hadiths, such as "the ink of a scholar is more holy than the blood of a martyr," that stressed the value of knowledge. The major Islamic capital cities of Baghdad, Cairo, and Córdoba became the main intellectual centers for science, philosophy, medicine, and education. During this period, the Muslim world was a collection of cultures; they drew together and advanced the knowledge gained from the ancient Greek, Roman, Persian, Chinese, Indian, Egyptian, and Phoenician civilizations.
Document 6: History of mathematics: Babylonian mathematics refers to any mathematics of the peoples of Mesopotamia (modern Iraq) from the days of the early Sumerians through the Hellenistic period almost to the dawn of Christianity. The majority of Babylonian mathematical work comes from two widely separated periods: The first few hundred years of the second millennium BC (Old Babylonian period), and the last few centuries of the first millennium BC (Seleucid period). It is named Babylonian mathematics due to the central role of Babylon as a place of study. Later under the Arab Empire, Mesopotamia, especially Baghdad, once again became an important center of study for Islamic mathematics.
Document 7: Samer Saeed: Samer Saeed Mujbel Al Mamoori () (born December 1, 1987 in Iraq) is an Iraqi midfielder. Samer plays currently with Al-Zawraa in Iraq, and for the Iraq national football team.
Document 8: Muthana Khalid: Muthana Khalid Al-Masloukhi (; born June 14, 1989, in Iraq) is an Iraqi midfielder. Muthana Khalid currently plays with Al Shorta SC in Iraq, and for the Iraq national football team. He is combative holding midfielder playing in that position regularly for Iraq national team. In October 2013 Muthana signed for Northern giants Erbil after spending six successful years at jawiya.
Document 9: History of science: From their beginnings in Sumer (now Iraq) around 3500 BC, the Mesopotamian people began to attempt to record some observations of the world with numerical data. But their observations and measurements were seemingly taken for purposes other than for elucidating scientific laws. A concrete instance of Pythagoras' law was recorded, as early as the 18th century BC: the Mesopotamian cuneiform tablet Plimpton 322 records a number of Pythagorean triplets (3,4,5) (5,12,13). ..., dated 1900 BC, possibly millennia before Pythagoras,  but an abstract formulation of the Pythagorean theorem was not.
Document 10: History of science: In Babylonian astronomy, records of the motions of the stars, planets, and the moon are left on thousands of clay tablets created by scribes. Even today, astronomical periods identified by Mesopotamian proto-scientists are still widely used in Western calendars such as the solar year and the lunar month. Using these data they developed arithmetical methods to compute the changing length of daylight in the course of the year and to predict the appearances and disappearances of the Moon and planets and eclipses of the Sun and Moon. Only a few astronomers' names are known, such as that of Kidinnu, a Chaldean astronomer and mathematician. Kiddinu's value for the solar year is in use for today's calendars. Babylonian astronomy was "the first and highly successful attempt at giving a refined mathematical description of astronomical phenomena." According to the historian A. Aaboe, "all subsequent varieties of scientific astronomy, in the Hellenistic world, in India, in Islam, and in the West—if not indeed all subsequent endeavour in the exact sciences—depend upon Babylonian astronomy in decisive and fundamental ways."
Document 11: Karim Rouani: Karim Rouani (born 8 March 1982 in Bordeaux) is a French footballer of Moroccan origin who plays for Stuttgarter Kickers.
Document 12: Mesopotamia: Mesopotamia is a historical region in West Asia situated within the Tigris -- Euphrates river system, in modern days roughly corresponding to most of Iraq plus Kuwait, the eastern parts of Syria, Southeastern Turkey, and regions along the Turkish -- Syrian and Iran -- Iraq borders.
Document 13: Maksudur Rahman Mostak: Maksudur Rahman Mostak is a Bangladeshi professional footballer who currently plays as a goalkeeper for Sheikh Jamal Dhanmondi Club in Bangladesh League.
Document 14: Mustafa Sarp: Mustafa Sarp (born November 5, 1980 in Bakırköy, Istanbul, Turkey) is a Turkish footballer who last played for Manisaspor as a midfielder.
Document 15: History of science: In mathematics, the Persian mathematician Muhammad ibn Musa al-Khwarizmi gave his name to the concept of the algorithm, while the term algebra is derived from al-jabr, the beginning of the title of one of his publications. What is now known as Arabic numerals originally came from India, but Muslim mathematicians did make several refinements to the number system, such as the introduction of decimal point notation. Sabian mathematician Al-Battani (850-929) contributed to astronomy and mathematics, while Persian scholar Al-Razi contributed to chemistry and medicine.
ground_truth: Islamic mathematics
sub_queries: Mustafa Karim >> place of birth Answer: Baghdad
What subject was studied in Baghdad ? Answer: Islamic mathematics