Question: Which friend of Krzysztof Kieślowski wrote the musical score to the film known in French as "Trois colours"?
Sentence (from "Three Colours trilogy"): All three were co-written by Kieślowski and Krzysztof Piesiewicz (with story consultants Agnieszka Holland and Sławomir Idziak) and have musical scores by Zbigniew Preisner.
Relevant evidence: Yes