Q: While working for his PhD, he collaborated concurrently with the Swiss urban planner Professor Arnold Hoechel and the architects Frei and Hunziker on several projects, including the first automatic bowling alleys in Meyrin Commune, Geneva, and Beirut, Lebanon. In 1961, he returned to Tehran as Deputy Technical Director of Iran-Rah, the largest Construction Co. of its time in Iran. In 1963, he created his own firm under the name of Borbor Consulting Architects, Engineers, City Planners. As President and managing director, he developed and expanded the business to a large multidisciplinary organization with several in-house departments which included: architecture, urban planning, environment, structure, mechanics, electricity and interior design. The firm employed a large number of highly qualified multi-national staff and included branch offices in several major cities in Iran. A few months prior to the 1978 Iranian Islamic Revolution, Borbor moved to Paris, France where he founded the Borbor International Management Consultants to Architects, Engineers, Planners. BIMC offered consultancy services in design, management and documentation to architectural and planning firms. In 1984, he moved to Los Angeles where he was involved in some architectural consultancy and research on Iranian and Persianate subjects. Borbor returned to Iran in 1991 and established the Research Institute and Library of Iranian Studies , a non-profit, non-political, private and independent institution dedicated to the promotion of research in the field of Iranian and Persianate studies with special emphasis on novel and creative research
How many architects did Arnold Hoechel work with?

A: 2

Q: The Vikings also fought several sea battles among themselves. This was normally done by binding the ships on each side together, thus essentially fighting a land battle on the sea. However the fact that the losing side could not easily escape meant that battles tended to be hard and bloody. The Battle of Svolder is perhaps the most famous of these battles. As Arab power in the Mediterranean began to wane, the Italian trading towns of Genoa, Pisa, and Venice stepped in to seize the opportunity, setting up commercial networks and building navies to protect them. At first the navies fought with the Arabs , but then they found themselves contending with Normans moving into Sicily, and finally with each other. The Genoese and Venetians fought four naval wars, in 1253-1284, 1293-1299,1350-1355, and 1378-1381. The last ended with a decisive Venetian victory, giving it almost a century to enjoy Mediterranean trade domination before other European countries began expanding into the south and west. In the north of Europe, the near-continuous conflict between England and France was characterised by raids on coastal towns and ports along the coastlines and the securing of sea lanes to protect troop-carrying transports. The Battle of Dover in 1217, between a French fleet of 80 ships under Eustace the Monk and an English fleet of 40 under Hubert de Burgh, is notable as the first recorded battle using sailing ship tactics. The battle of Arnemuiden , which resulted in a French victory, marked the opening of the Hundred Years War and was the first battle involving artillery. However the battle of Sluys, fought two years later, saw the destruction of the French fleet in a decisive action which allowed the English effective control of the sea lanes and the strategic initiative for much of the war.
What was the last year of the last naval war between the Genoese and Venetians?

A:

Q: The 8,878 housing units averaged 685.5 per square mile (264.7/km), of which 6,287 (73.6%) were owner-occupied, and 2,256 (26.4%) were occupied by renters. The homeowner vacancy rate was 1.2%; the rental vacancy rate was 5.2%. Around 17,769 people (77.1% of the population) lived in owner-occupied housing units and 5,280 people (22.9%) lived in rental housing units.
How many more percentage points of the population lived in owner-occupied housing units than rental housing units?

A: 54.2

Q: In Sofia there are 607,473 dwellings and 101,696 buildings. According to modern records 39,551 dwellings were constructed until 1949, 119,943 between 1950 and 1969, 287,191 between 1970 and 1989, 57,916 in the 90s and 102,623 between 2000 and 2011. Until 1949, 13,114 buildings were constructed and between 10,000-20,000 in each following decade. Sofias architecture combines a wide range of architectural styles, some of which are aesthetically incompatible. These vary from Christian Roman architecture and medieval Bulgar fortresses to Neoclassicism and prefabricated Socialist-era apartment blocks. A number of ancient Roman, Byzantine and medieval Bulgarian buildings are preserved in the centre of the city. These include the 4th century Church of St. George, Sofia, the walls of the Serdica fortress and the partially preserved Amphitheatre of Serdica.
What buildings are preserved in the center of the cities?

A:
ancient Roman