With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: The next morning they all find themselves at the prison where the confusion increases and is compounded by the jailer, Frosch, who has profited from Warden Frank's being away by becoming gloriously drunk. Alfred, still in jail in Eisenstein's place, irritates the other prisoners by singing operatic arias.
text_B: Does Warden Frank often leave Frosch in charge of the prison by himself?
DON'T KNOW.