With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: He was born in Pavia, Lombardy, the fourth child of his mother's marriage to Fazio Cardano, a mathematically gifted jurist, lawyer, and close personal friend of Leonardo da Vinci. In his autobiography, Cardano wrote that his mother, Chiara Micheri, had taken "various abortive medicines" to terminate the pregnancy; he was "taken by violent means from my mother; I was almost dead." She was in labour for three days. Shortly before his birth, his mother had to move from Milan to Pavia to escape the Plague; her three other children died from the disease.
text_B: Does this passage suggest that Chiara Micheri was herself unmarried, or possibly having an affair, when she became pregnant with the young Cardano?
NO.