Detailed Instructions: In this task, you're given a context passage. Your job is to generate relevant questions that can be answered by directly referring to the passage.
Problem:In fact , so much so , that the lines contained large chunks of yeast and protein . And it wasn't just my unfiltered - Belgian - beer line . The lines for Stella Artois and Miller Lite , if not chunky , were also filthy . I told the owner that he needed to clean his draft beer lines , and pronto .
Solution:
Why did the lines contain large chunks of yeast and protein ?