Table: rail_line_info
Columns: line
terminals
status
length
total_number_of_stations
operator

Question: Which operator runs the Mamariga shuttle line?
SQL: SELECT "operator" FROM rail_line_info WHERE "line" = 'Mamariga Shuttle'

Question: How many lengths of line 3 are given?
SQL: SELECT COUNT("length") FROM rail_line_info WHERE "line" = 'Line 3'

Question: What are the terminals for line 2?
SQL: SELECT "terminals" FROM rail_line_info WHERE "line" = 'Line 2'

Question: What is the status of the airport line?
SQL: SELECT "status" FROM rail_line_info WHERE "line" = 'Airport Line'