Although she was nearly unknown several years ago, last year compact discs recorded by ten different choral groups included works by hildegard of bingen, a european abbess during the twelfth century. the profoundly beautiful music of hildegard of bingen has recently become very popular. in relation to the first sentence, what does the second sentence do

The answer to the question above is that, IT EVALUATES THE EVIDENCE. Notice that the first sentence is talking about recording of choral groups and Hildegard of Bingen's work is also part of it. The work of Bingen here is being emphasized as it relates to the recordings. Now, the second sentence here adds more information about Bingen's work by evaluating the evidence.

Yeah,i'm gonna take my horse to the old town road. i'm gonna ride till i can't no more.