With no explanation, label text_A→text_B with either "entailment", "neutral" or "contradiction".
text_A: The Su-37 features an upgraded avionic suite and fire-control system but its most notable additions are the thrust vectoring nozzles; only one prototype was converted.
text_B: The Su-38 features an upgraded avionic suite and fire - control system but its most notable additions are the thrust vectoring nozzles; only one prototype was converted.
contradiction.