Complex sentence: In the year 2001, a sample of "Ja to Ja" which was sung by Piotr'Gutek' Gutkowski was used in an ice cream commercial without the group members' agreement, but with the knowledge of Gigant Records.
Split into simpler sentences: In the year 2001, a sample of "Ja to Ja" which was sung by Piotr'Gutek' Gutkowski was used in an ice cream commercial. This occurred without the agreement of the group, but with the knowledge of Gigant Records.