The "Fan Save" was introduced in the fourteenth season. During the finals, viewers are given a five-minute window to vote for the contestants in danger of elimination by using their Twitter account to decide which contestant will move on to the next show, starting with the Top 8.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How do viewers vote for a contestant using Fan Save?
Ah, so.. Twitter

Mali (i/ˈmɑːli/; French: [maˈli]), officially the Republic of Mali (French: République du Mali), is a landlocked country in West Africa. Mali is the eighth-largest country in Africa, with an area of just over 1,240,000 square kilometres (480,000 sq mi). The population of Mali is 14.5 million. Its capital is Bamako. Mali consists of eight regions and its borders on the north reach deep into the middle of the Sahara Desert, while the country's southern part, where the majority of inhabitants live, features the Niger and Senegal rivers. The country's economy centers on agriculture and fishing. Some of Mali's prominent natural resources include gold, being the third largest producer of gold in the African continent, and salt. About half the population lives below the international poverty line of $1.25 (U.S.) a day. A majority of the population (55%) are non-denominational Muslims.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Of Africa what rank in size country is Mali?
Ah, so.. Mali is the eighth-largest country in Africa

Imperial submitted a total of 1,257 staff across 14 units of assessment to the 2014 Research Excellence Framework (REF) assessment. In the REF results 46% of Imperial's submitted research was classified as 4*, 44% as 3*, 9% as 2* and 1% as 1*, giving an overall GPA of 3.36. In rankings produced by Times Higher Education based upon the REF results Imperial was ranked 2nd overall for GPA and 8th for "research power" (compared to 6th and 7th respectively in the equivalent rankings for the RAE 2008).
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who was ranked 2nd overall in test scores?
Ah, so..
unanswerable