This task involves creating answers to complex questions, from a given passage. Answering these questions, typically involve understanding multiple sentences. Make sure that your answer has the same type as the "answer type" mentioned in input. The provided "answer type" can be of any of the following types: "span", "date", "number". A "span" answer is a continuous phrase taken directly from the passage or question. You can directly copy-paste the text from the passage or the question for span type answers. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words. A "number" type answer can include a digit specifying an actual value. For "date" type answers, use DD MM YYYY format e.g. 11 Jan 1992. If full date is not available in the passage you can write partial date such as 1992 or Jan 1992. If you find multiple spans, please add them all as a comma separated list. Please restrict each span to five words.

Q: Passage: In 1976, the then Syrian president Hafez al-Assad sent troops into Lebanon to fight PLO forces on behalf of Christian militias. This led to escalated fighting until a cease-fire agreement later that year that allowed for the stationing of Syrian troops within Lebanon. The Syrian presence in Lebanon quickly changed sides; soon after they entered Lebanon they had flip-flopped and began to fight the Christian nationalists in Lebanon they allegedly entered the country to protect. The Kateab Party and the Lebanese Forces under Bachir Gemayel strongly resisted the Syrians in Lebanon. In 1989, 40,000 Syrian troops remained in central and eastern Lebanon under the supervision of the Syrian government. Although, the Taif Accord, established in the same year, called for the removal of Syrian troops and transfer of arms to the Lebanese army, the Syrian Army remained in Lebanon until the Lebanese Cedar Revolution in 2005 to end the Syrian occupation of Lebanon. In 1994, the Lebanese government under the pressure of the Syrian government, gave Lebanese passport to thousands of Syrians. There are nearly 1.08 million registered Syrian refugees in Lebanon. 
Question: How many years was it from when Hafez al-Assad sent troops into Lebanon and when the Lebanese government gave Lebanese passports to thousands of Syrians? 
Answer type: Number 

A: 28.
****
Q: Passage: The Livonian Master, like the grandmaster of the Teutonic Order, was elected by his fellow knights for a life term. The grandmaster exercised supervisory powers and his advice was considered equal to a command. The grandmaster of Teutonic knights did not limit local autonomy, he rarely visited Livonia or sent ambassadors for oversight.   ●  Hermann Balk 1237-1238  ●  Dietrich von Grüningen 1238-1242  ●  Dietrich von Grüningen 1244-1246   ●  Andreas von Stierland 1248-1253  ●  Anno von Sangershausen 1253-1256  ●  Burchard von Hornhausen 1256-1260  ●  Werner von Breithausen 1261-1263  ●  Konrad von Mandern 1263-1266  ●  Otto von Lutterberg 1266-1270  ●  Walther von Nortecken 1270-1273  ●  Ernst von Rassburg  1273-1279   ●  Konrad von Feuchtwangen 1279-1281  ●  Wilken von Endorp 1281-1287  ●  Konrad von Herzogenstein 1288-1290  ●  Halt von Hohembach -1293  ●  Heinrich von Dinkelaghe 1295-1296  ●  Bruno 1296-1298  ●  Gottfried von Rogga 1298-1307  ●  Gerhard van Joeck 1309-1322  ●  Johannes Ungenade 1322-1324  ●  Reimar Hane 1324-1328  ●  Everhard von Monheim 1328-130  ●  Burchard von Dreileben 1340-1345  ●  Goswin von Hercke 1345-1359  ●  Arnold von Vietinghof 1359-1364  ●  Wilhelm von Vrymersheim 1364-1385  ●  Robin von Eltz 1385-1389  ●  Wennemar Hasenkamp von Brüggeneye 1389-1401  ●  Konrad von Vietinghof 1401-1413  ●  Diderick Tork 1413-1415  ●  Siegfried Lander von Spanheim 1415-1424  ●  Zisse von Rutenberg 1424-1433  ●  Franco Kerskorff 1433-1435  ●  Heinrich von Bockenvorde 1435-1437  ●  Heinrich Vinke von Overbergen 1438-1450  ●  Johann Osthoff von Mengede 1450-1469  ●  Johann Wolthuss von Herse 1470-1471  ●  Bernd von der Borch 1471-1483  ●  Johann Freytag von Loringhoven 1483-1494  ●  Wolter von Plettenberg 1494-1535  ●  Hermann Hasenkamp von Brüggeneye 1535-1549  ●  Johann von der Recke 1549-1551  ●  Heinrich von Galen 1551-1557  ●  Johann Wilhelm von Fürstenberg 1557-1559  ●  Godert  Kettler 1559-1561. 
Question: How many years was Heinrich von Galen a Livonian Master? 
Answer type: Number 

A: 6.
****
Q: Passage: As of the 2010 U.S. Census, there were 113,934 people, 20,502 families, and 47,060 households residing in the city. The population density was 4,093.9 people per square mile (1,580.7/km²), making it less densely populated than Detroit proper and its inner-ring suburbs like Oak Park, Michigan and Ferndale, Michigan, but more densely populated than outer-ring suburbs like Livonia, Michigan and Troy, Michigan. The racial makeup of the city was 73.0% White (U.S. Census) (70.4% non-Hispanic White), 7.7% Race and ethnicity in the United States Census, 0.3% Race and ethnicity in the United States Census, 14.4% Race and ethnicity in the United States Census, 0.0%  Race and ethnicity in the United States Census, 1.0% from Race and ethnicity in the United States Census, and 3.6% from two or more races. Race and ethnicity in the United States Census or Race and ethnicity in the United States Census residents of any race made up 4.1% of the population. Ann Arbor has a small population of Arab Americans, including  students as well as local Lebanese Americans and Palestinian Americans. 
Question: How many people are there per 2 square miles? 
Answer type: Number 

A:
8187.8.
****