What is the fine-grained topic of the following text: The Expendables led by Barney Ross (Sylvester Stallone) and formed by Lee Christmas (Jason Statham), Gunnar Jensen (Dolph Lundgren) and Toll Road (Randy Couture) extract former member Doctor Death (Wesley Snipes), a knives specialist and team medic, from a military prison during his transfer on a train. Only return the topic.
"The Expendables team extraction of Doctor Death from military prison"