ใครคือผู้สร้างรถที่ Jan Lammers ทำได้ 7-14 รอบ?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
Who was the constructor of the car that Jan Lammers made 7-14 rounds in?It is not neccessary to use all the tables.
 table_name_25:  (constructor [ VARCHAR ] driver [ VARCHAR ] rounds [ VARCHAR) ]
SELECT constructor FROM table_name_25 WHERE driver = "jan lammers" AND rounds = "7-14"