Table:
text: 1997 Giro d'Italia
Classification leadership
Classification leadership by stage
Stage Winner General_classification Points_classification Mountains_classification Intergiro_classification Trofeo_Fast_Team
9 Dimitri Konyshev Pavel Tonkov Mario Cipollini Mariano Piccoli Dimitri Konyshev Asics-C.G.A.
10 Mario Cipollini Pavel Tonkov Mario Cipollini Mariano Piccoli Dimitri Konyshev Asics-C.G.A.
11 Gabriele Missaglia Pavel Tonkov Mario Cipollini Mariano Piccoli Dimitri Konyshev Asics-C.G.A.
12 Giuseppe Di Grande Pavel Tonkov Mario Cipollini Mariano Piccoli Dimitri Konyshev Asics-C.G.A.
13 Glenn Magnusson Pavel Tonkov Mario Cipollini Mariano Piccoli Dimitri Konyshev Asics-C.G.A.
14 Ivan Gotti Ivan Gotti Mario Cipollini José Jaime González Dimitri Konyshev Team Polti
15 Alessandro Baronti Ivan Gotti Mario Cipollini José Jaime González Dimitri Konyshev Asics-C.G.A.
16 Fabiano Fontanelli Ivan Gotti Mario Cipollini José Jaime González Dimitri Konyshev Asics-C.G.A.

Question: What scoring system was used in stage 15 of the 1997 Giro d'Italia?