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 in November. Her mother, Ana Franca, had previously had an affair with a Madrid inn keeper but had broken it off a year before the birth, and they apparently concealed Isabel from him, while Cervantes and Ana Franca raised her together. 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?
NO.