Question: When was the american rock band hosted at Kongreßhalle active? 
Sentence (from "The Gaunga Dyns"): In the intervening years their work has come to the attention of garage rock enthusiasts, particularly some of their bolder songs such as "Rebecca Rodifier", which is one of the earliest rock songs to address the topic of abortion, and "No One Cares", which employs odd time signatures and changes.
Relevant evidence: No