Get canonical data from variable

[kyao]

Implement GET /datasets/id/variables/id2

The API will include a query string where the user specifies the country

For example, GET /datasets/UAZ/variables/VUAZ-0 without any query parameters should return:

dataset_id,variable_id,variable,main_subject,main_subject_id,value,value_unit,time,time_precision,country,place,coordinate
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.16,%,1971-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.16,%,1972-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.17,%,1973-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.17,%,1974-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.15,%,1975-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.15,%,1976-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.16,%,1977-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.19,%,1978-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.2,%,1979-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.19,%,1980-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.21,%,1981-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.19,%,1982-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.21,%,1983-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.18,%,1984-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.18,%,1985-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.16,%,1986-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.27,%,1987-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.24,%,1988-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.23,%,1989-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.26,%,1990-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)
UAZ,VUAZ-0,"FAO: Agriculture and forestry energy use as a % of total Energy use, Energy used in agriculture and forestry[%]",Ethiopia,Q115,0.18,%,1991-01-01T00:00:00Z,year,Ethiopia,,Point(40.0 9.0)