Original sentence: Noted for the dynamism of their live performances and for their thoughtful music, they are also acknowledged as having been rock pioneers, popularizing among other things the power chord and the rock opera (most notably "Tommy") under the leadership of Pete Townshend
Edited sentence: Noted for the dynamism of their live performances and for their thoughtful music, they are also acknowledged as having been rock pioneers, popularizing among other things the power chord and the rock opera (most notably the immortal "Tommy") under the leadership of Pete Townshend