With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Shortly before this, his daughter Isabel was born, but some at the time suspected that she was an illegitimate child of a Madrid inn keeper. Her mother, Ana Franca, had married Cervantes a year before and they apparently concealed it from her on-again, off-again lover, as Cervantes raised her as his daughter. When Ana Franca died in 1598, he asked his sister Magdalena to take care of her.
text_B: Does the passage leave open the possibility that Cervantes was actually not the biological father of Isabel?
YES.