user: ### NOW ANSWER:
Question: What is the Speed when Construction begun in 2010, and an Expected start of revenue services of 2015?
Columns: ['Line', 'Speed', 'Length', 'Construction begun', 'Expected start of revenue services']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['Svilengrad -Turkish Border', '200km/h', '19km', '2010', 2012.0]
SQL:

assistant: SELECT "Speed" FROM "Table" WHERE "Construction begun" = '2010' AND "Expected start of revenue services" = 2015.0;