I want to know the answer to the following question:
Which symphony of Anton Bruckner's does the Wagner tuba have a prominent role in?
All the background I'm provided with is that "The Wagner tuba, a modified member of the horn family, appears in Richard Wagner's cycle Der Ring des Nibelungen and several other works by Strauss, Béla Bartók, and others; it has a prominent role in Anton Bruckner's Symphony No. 7 in E Major.". Is that enough to answer the question?
Answer: yes