Question: Russian Roulette is the which number studio album by German heavy metal band Accept, released in 1986, it would be the last Accept album to feature Udo Dirkschneider as lead vocalist, Dirkschneider is a German heavy metal singer? 
Sentence (from "Russian Roulette (Accept album)"): Russian Roulette is the seventh studio album by German heavy metal band Accept, released in 1986.
Relevant evidence: Yes