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 "Bill Hudson (guitarist)"): He currently works with German heavy metal bands U.D.O and Dirkschneider, both fronted by former Accept vocalist Udo Dirkschneider.
Relevant evidence: No