Question: Johnny Hallyday is a French singer and actor once married for 15 years to popular Bulgarian-French singer Sylvie Vartan whose performances often featured what type of choreography? 
Sentence (from "Sylvie Vartan"): Yearly shows with then-husband Johnny Hallyday attracted full houses at the Olympia and the Palais des congrès de Paris throughout the 1960s and mid-1970s.
Relevant evidence: No