With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: He introduced the concept as early as the 1920s but gave a full statement of it only in 1951 in an Eranos lecture.
text_B: He introduced the concept as early as the 19201 but gave a full statement of it only in 1951 in an Eranos lecture.
contradiction.