Sentence:I am at my happiest when I am in a smoke-filled, crowded bar with the [e1]riffraff[/e1] of [e2]savages[/e2] I call my friends, our voices raised, our faces flushed, our speech slurred, as we strumble from one poorly constructed argument to the next half-baked bagful of lies (to quote Michael Jackson).
 e1: riffraff. 
 e2 : savages.
Answer: Member-Collection(e2,e1)